Just the other day at work a woman was saying her friend had been wanked at on the train after a night out the previous evening.
The vast vast majority of women and girls have had unwanted sexual behaviour at them, whether it's at the "low" end - groping, feeling up, following, pestering, being wanked at, less at the more serious end but really it's extremely common.
My friend was 14 when a bus driver said he'd let her off her fare if she showed him her tits - that sort of stuff happened occasionally and we all laughed about it and told no-one because that is what girls were socialised to do in my day when men did stuff like that.
Sex offences are incredibly common, so common that many incidences are considered as nothing even worth mentioning. To take this to mean they aren't happening is odd.
When I talk to my friends most of them have had sex which was coerced, or they woke up to find someone having sex with them, or they were too pissed to be able to do anything about it. Just most women see that stuff as an occupational risk of being female and brush themselves down and get on with it and don't ever think about the legalities of what happened. This doesn't actually mean that a crime hasn't been committed though, and maybe this is the problem here. A lot of people only see rape as excessively violent stranger stuff and if it's "just" assaulting a colleague after a few drinks on a night out then that's just normal isn't it, she should put up and shut up and not bring down a good man or whatever always gets said.
In plenty of the "false accusation" cases what it actually means is "yeah he did something but I don't think it's bad enough to be labelled "rape" and for sure he shouldn't be punished why is she making a fuss".