This is the difference between being attracted to prepubescents, and being attracted to minors who have undergone puberty:
Prepubescents do not have the physical sexual maturity that human beings should be attracted to. By definition. Being attracted to them shows a profound disturbance in normal brain function.
Being attracted to a 16 or 17 year old shows much, much less deviation from normal human sexual behaviour. Again, by definition. Going through puberty = becoming sexually mature. Now, notice how i said “being attracted to” not “hanging around the local school trying to pick up minors.” It’s illegal for a reason. Kids need to be protected from much older adults who know how to exploit and abuse them.