Its bad logic. Because pedophilia isnt really binary, although it may be useful to treat it as such by a society. Some people are born highly likely to be pedos. Others might have a slight predisposition.  That is where culture comes in.  Does a culture strongly condemn sex with anyone under 18? Or does it condone sex with  very young people, 12 year olds, or 9 year olds?  This is a signal to everyone that sexual attraction to 12 year olds is ok. Nothing bad will happen to you if you indulge in this impulse.  THE ONLY WAY to keep your society from embracing pedophilia, AS MANY OTHERS SOCIETIES HAVE, is to deal with these “victimless” behaviors IN THE HARSHEST MANNER.