Or else what? God will let our children slip into fatal error if we tarry a bit too long?
Your statement illustrates our differences perfectly. The error the RCC teaches is that before baptism a child is on his own, and after the sacrament has been administered, that child is then a child of God. So when RCs tell us their sacrament of baptism doesn't actually confer salvation, we have it from you that indeed, it (supposedly) does...
Now you have it; now you don't. Now you're acquitted; now you're condemned. Now you're a child of God; now you're not. Now you're a member of His family; now you're not. Now you're saved; now you're lost.
It doesn't work that way.
To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins. While Peter yet spake these words, the Holy Ghost fell on all them which heard the word. And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost. For they heard them speak with tongues, and magnify God. Then answered Peter, Can any man forbid water, that these should not be baptized, which have received the Holy Ghost as well as we? And he commanded them to be baptized in the name of the Lord. Then prayed they him to tarry certain days." -- Acts 10:42-48"And he commanded us to preach unto the people, and to testify that it is he which was ordained of God to be the Judge of quick and dead.
Note what He commands us to do.