Where people are saying he hasn't broken any laws, how do we know. We don't.
So while the purpose of the FBI push to speak with him is couched very much in terms of PA providing info regarding the dealings of Epstein it may well be that he did have knowledge of illegal activity or willingly participated.
The age of consent is only part of the issue. Having sexual with someone who is being coerced and forced into that position having been trafficked, which may or not be the case with PA, would be rape at the least, if not with some sort of charge for the trafficking element.
The point is we don't know and by not cooperating with the American authorities it looks to outsiders like he has more to hide. If he was certain his behaviour was within the law, albeit distasteful, I suspect he'd have more respect from the public for giving them all the info he has willingly and apologising for being a bit of an idiot.
But he's hiding. He's hiding rather than do that.