Y'know,
If infant baptism were so important, then the Bible would say things like:
And Peter said to them, "Be baptised in the name of Jesus Christ, you will be forgiven of your sins you committed when you were a week old, and then repent 10 years later."
Therefore go and make disciples of all babies, baptizing them in the name of the Father and of the Son and of the Holy Spirit. 10 years later teach them to obey everything I have commanded you.
So in Christ Jesus you are all children of God through faith, for all of you who were baptized into Christ as babies somehow got clothed with Christ, despite being a week old.
We were buried therefore with him by baptism into death when we were a week old, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life when we were babies, toddlers, and children.
And while staying with them he ordered them not to depart from Jerusalem, but to wait for the promise of the Father, which, he said, “you heard from me; for John baptized with water, and oddly enough only those of you who were adults, but you and your newborn babies will be baptized with the Holy Spirit not many days from now.”
Baptism as a baby, which corresponds to this, now saves you, not as a removal of dirt from the body but as an appeal to God for a good conscience for a newborn baby, through the resurrection of Jesus Christ, who has gone into heaven and is at the right hand of God, with angels, authorities, and powers having been subjected to him.
And now why do you wait? Rise and bring your babies here to be baptized and wash away their sins; you'll need to get your newborns to call on his name.
But the Bible doesn't say any of those things. Every time the Bible talks about baptism, it only makes sense as something for a believer in Jesus to do who has the capability to believe in Jesus to cleanse the of sin, to repent of their sins, and to choose to be baptised. When it tells us to go and make disciples of all nations, it doesn't tell us to go and find babies to baptise. It tells us to preach the gospel.
I have a 1 year old, and he can't understand the gospel yet. I can talk to him about Jesus, pray with him, but he barely understands what any of it means. I bring him to church anyway and he sort of gets "what to do" when we kneel in the benches to pray, but that's about it. He doesn't understand what repentance even means. He's too young to know what right and wrong mean.
Yet the Eastern Orthodox persist in not just baptising infants, but also "confirming" them when they are a week old and giving them their first communion - to newborns who are still nursing. How does that make the slightest sense at all? Where does the Bible teach doing such has any value?