I FOUND THE PERFECT ANSWER TO "Not All Men"
Out of 10 men, 1 makes a sexual joke directed at a woman, 2 laugh alone, 3 don't find it funny but still chuckle to fit in, and 4 say nothing, pretending they didn't hear it at all. Not a single one speaks up, and not a single one stops it. Later, aside from the man who made the joke, the other nine all believe the same thing: men like that are a minority and most men aren't like this, seeing themselves as part of the "good majority".
However, from the perspective of the woman being harassed, there is no big difference between them because the laughter, the silence, and the looking away all create the same environment. When women say most men are the same, this is what they mean: while not every man harasses women, most men participate in protecting the system that does.
And to add to this, even if you're alone with him and he doesn't attack you, that doesn't mean that he won't next time. There's no way to ever know that it won't happen some day because the calculations that they're doing aren't visible. Someone tried to rape one of my ex friend when she was a middle schooler and she was around him for over a year before that. He had maybe two or three opportunities to rape her before he actually tried but I think he still thought he had a chance at dating her so he refrained, and he only tried to rape her after he felt like he didn't have a chance. So with the men who will bide their time for years hoping you eventually become theirs, you could be alone with them and never know that they'll rape you the moment they decide you aren't going to fall for them after all. (azooz's example is perfect for this)
Almost all men participate in protecting the system that oppresses women.
Men think they're a good guy because they don't overtly violate or harm women but men regularly passively aggressively harm women by silently participating in other men's harassment of women and quietly exploiting women's unpaid labour for their benefit.
DO NOT FUCKING STEAL THIS BLOG A**HOLE