Not sure I follow what your saying fully. What I'm saying is that I think, and I could be wrong, Catholics believe that it's imparative that the baby be baptised. And I could be wrong but I think they think that somehow saves the kid. I don't think so. The baby could die 2 hours after being born, never baptiszed and go to heaven since it's still innocent, and unaware. It's not some human ritual thats somehow gonna save it. But I think later on in life when the person reaches teen to adult years if at that point they get baptized they're doing the ritual with the concious knowledge of what they're doing, being born again, to symbolize there's new found faith, accepting Christs into there heart and sacrific for there sin. Almost like an extention of doing just the sinners prayer. But again I think that too even as an adult is symbolic and just a ritual. Again even as an adult I don't think that you'll show up to the perly gates and they'll be like "hmmm lets see was he baptized as an adult, No, oh well down you go". Again the adult baptism is I think a very good thing. Not manditory, but it's like any other ritual that it signifies the level of your belief to some extent that you'd be willing to do the ritual. But again jesus and the theif at the cross he said to him that he'd be saved and the theif had no time to do anything right. But getting back to catholics I think, and I could be wrong, they think that to be saved you must get baptised. Again I could be wrong. That's why I was gving the example of the baby.
See Job 14:1-4 and Psalm 51:5 specifically. Note that Our Lord tells us that we should let the children come to Him because the Kingdom of God doesn't belong to them. There's no mention of an "age of reason". God's grace isn't limited to those who can ask for it. It's much greater than that. Look at Mark 10:14, Matt 19:14, and Luke 18:15. All examples of Our Lord bestowing grace on infants and children. Why would the grace of Baptism be any different?