I was wondering if you had an unequivocal answer.
But it is obvious you are conflicted between logic and popular consensus in giving an opinion.
I don't blame you for that.
I don't give you an answer because I have no way of knowing the truth. I might as well flip a coin. That isn't equivocation, it's reasoned admission of ignorance.
Sigh.. shouldn't post just after waking up from a night out. I think the answer most likely to be true is that no, it is not just a numerical age difference that causes the trauma and thus constitutes abuse. It's probably a number of factors.. Familial relations, position of power/trust over victim, levels of coersion/consent, etc.
Society has decided a need to restrict underage sex, and has decided to do it mostly using the imperfect logic of ability ot consent.. You're right, I am "conflicted between logic and popular consensus" in arguing against the imperfect ability of consent scheme.