Is infant baptism as valid as believer's baptism?

[LabourJersey]

I would assume the reason why Christ wasn't baptized until adulthood was because John the Baptist wasn't out conducting his own ministry in Christ's infancy.

Anyway, Baptism is the entrance to the Christian world, in my opinion. We enter the secular world in infancy without our own knowledge - I don't see anything wrong with entering the religious world in similar fashion.

(Though this reminds me of a question I've heard in a faith formation class: Why did Christ even need to be baptized? But that's a different discussion for another time).