Whether you perform paedo-baptism (infant baptism) or credo-baptism (adult baptism) does not really make a difference. You face the exact same problems regardless of which practice you choose to implement. You do not understand this because you fail to understand baptism correctly.
Paedo-baptism has been practiced as early as at least A.D. 200. It is practiced by all the major denominations, including Catholicism. Despite having this kind of track record, it does not necessarily mean that the practice is biblical. When you consider the practice of circumcision, the practice of infant baptism makes complete logical sense, having been expanded upon to include female children. But even this does not necessarily mean that it is biblical.
I have already discussed in the past how baptism and circumcision are identical. Baptism, like circumcision, is a sign and seal of the truth of God's promise—to give righteousness to all who have faith—and testifies in one of two ways. One, it testifies to a blessing (that righteousness is given to those of faith); two, it testifies to a curse (that those who break the covenant will be cut off). Consider Isaac and Ishmael and Jacob and Esau. Their circumcisions acted as a witness either for or against them as they grew and learned about God and His precepts. Whether you are circumcised as a child or as an adult, or whether you are baptized as a child or as an adult, this applies exactly the same.
Baptism and circumcision are different externally, but they are exactly identical internally. They represent the same things: both are initiatory rites (Gen. 17:10-11; Matt. 28:19; Acts 2:38-39; 8:12-13); both signify an inward reality (Rom. 2:28-29; Col. 2:2-12; Phil. 3:3); both picture the death of the old man of sin (Rom. 6:3-7; Col. 2:11-12); both represent repentance (Jer. 4:4; 9:25; Lev. 26:40-41; Acts 2:38); both represent regeneration (Rom. 2:28-29; Titus 3:5); both represent justification by faith (Rom. 4:11-12; Col. 2:11-14); both represent a cleansed heart (Deut. 10:16; 30:6; Isa. 52:1; Acts 22:16; Titus 3:5-7); both represent union and communion with God (Gen. 17:7; Ex. 19:5-6; Deut. 7:6; Heb. 8:10); both indicate citizenship in Israel (Gen. 17:4; Gal. 3:26-29; Eph. 2:12-13; 4:5); both indicate separation from the world (Ex. 12:48; 2 Cor. 6:14-18; Eph. 2:12); and both can lead to either blessings or curses (Rom. 2:25; 1 Cor. 10:1-12; 11:28-30).
When you were born, were you born as a full citizen of your country with all the rights, responsibilities, and privileges thereof? Yes, you were. However, because you were young, you did not know of these rights, responsibilities, and privileges and could not appropriate them. You had to be taught them. When you were older, you then either embraced them as your own or rejected them, which is treason and demands you leave your country. The same is true concerning circumcision and baptism. The son circumcised on the 8th day had no faith of his own. He knew nothing of the covenant promises and had to be taught them. As he grew, he could then embrace what he was taught by faith and appropriate the blessings unto himself, or reject what he was taught, becoming an apostate, and appropriate the curses unto himself.
Again, while this makes complete logical sense in support of paedo-baptism, nevertheless it still does not mean that it is biblical. It may be biblical, but none of this means that it is. These are merely inferences. But in either case, as I said earlier, whether you implement paedo-baptism or credo-baptism, it makes absolutely no difference. Why?
How many adolescents and/or adults have you witnessed baptized only to walk away from the faith? They did not "forfeit" or "lose" their salvation, as the Charismatic denominations tend to teach (out of their ignorance of this subject, too); they never had salvation to begin with. Judas, Simon the magician, and Demas (among others) are excellent examples in Scripture of adults who were baptized and yet had no real faith. Jesus' parables explain this perfectly. When the Gospel is presented, there are those who, through the Holy Spirit, receive it and flourish (genuine converts; see Matt. 13:8, 23); and there are those who appear to be converted, and seem "on fire" for the Lord, but when trials, tribulations, and persecution come, they wither away because they were never actually grounded (false converts; see Matt. 13:5-7, 20-22). Jesus says that both genuine and false will grow up in the Congregation together until the Harvest.
Whether you are baptized as a child and grow up and have nothing to do with the faith, or you are baptized as an adolescent or an adult and eventually have nothing to do with the faith, the result is exactly the same. The problems faced are exactly the same. When you perform baptism does not change a thing. In both cases, adequate discipleship needs to take place, the Holy Spirit must do His work, and the faith must be embraced and be made their own. Remember the cliché, "God does not have any grandchildren"? You cannot ride the coattails of your parents. How many people grew up in a congregation (regardless of denomination), in a religious household, and have since abandoned the faith? How many have embraced sin, such as homosexuality or transgenderism, and are presently defined by it? These people were never saved to begin with. We need to stop making excuses for these people!
If you want to implement paedo-baptism, then do so according to your belief, but remember that baptism is not some magical formula and does not save! If you want to implement credo-baptism, then do so according to your belief, and remember the same. "Each person must be fully convinced in his own mind" (Rom. 14:5). "Each one of us will give an account of himself to God" (Rom. 14:12). People from both sides have switched over to the other side, so the argument is not as clear cut as some would have you believe. The stronger evidence supports paedo-baptism, but again it is merely inference and does not necessarily mean that it is biblical. "Therefore let us not judge one another anymore, but rather judge this—not to put a stumbling block or offense before a brother" (Rom. 14:13).