There are some people who really are awful to women, and they're often (but not always) really awful to work with in other ways too. Finding ways to get them to either improve or get out is tricky because they exist in the same career ladders as people who want a decent place to work.
Then there's a subset of people opposing them who insist on overly narrow notions of how people should be allowed to act, talk, and think. They take it on themselves to police speech and behaviour far more than is reasonable or necessary. In their effort to deal with a legitimate problem, they become another kind of problem.
Making all this less clear is that the boundaries between these are unclear and they tend (but don't always) to line up with political views, and political witchhunts in the workplace (or broader society) are dangerous and ill-advised.
It's messy enough that it'd be tempting to just step back from the whole thing, but the stakes are too high for that. We neither should want to waste the potential of half our population (or other subsets of the population) nor should we create a work environment or society where most kinds of differing views on gender or jokes are curtailed. So navigating this is damned tough.