Not even being provocative but if you think Greta Thunberg has the maturity to guide global policy-making then you cannot object to Jeffrey Epstein paying 16-year-olds for sex.
I value consent! If the 16 year old did not consent, then this is terrible. If she did consent, then I don't view it as terrible. I don't have enough information to know how much she consented at the time. To be clear, it's plausible that she was coerced, I'm willing to buy it.
Except that this was her idea, do some research for once in your life. Pathetic that you automatically assume that she's being coerced after all the hard work she's done on the subject.