Baptism / initiation into religion is often 'doing a deal' with people who may or may not be graceful about the 'bargain'; Baptism into a cult it is a bizarre type of thing - like kiddies doing deals with devils - that will hold them to it, not gracefully, and even bring up the fine print not originally understood.
Baptism into Christ is all good - but in light of the alternative practices above, people aren't believing that - it was the same 2000 yrs ago - because of people's behaviour, others were scared of the giant imaginary "jewish money lender" in the sky.
Let the children come to me, and do not hinder them; for to such belongs the kingdom of heaven