All men and women are "touched" by sexism(towards women) to some extent, the world is at the core and at the surface filled with sexist messages, just that some are so subtle and ingrained in the fabric of society that they are almost not noticeable, unquestioned.

In the same way all white people are touched by racism. The idea is to analyze everything, the meaning and origin of everything we're conditioned to believe about one another and about ourselves from the perspective of gender, sexuality or ethnicity and better ourselves, cure ourselves of these harmful perceptions, catching and correcting ourselves when we have a knee jerk reaction to judge someone in any way based on something like their gender or color.

No one is blaming all men and of course there's a lot of men who are absolutely feminist and reject toxic masculinity and so on. The idea is that we are all sadly starting off by being socialized and conditioned to have some sexist perceptions, because those are the messages we're bombarded by from a young age when we absorb without being able to choose.

It's not pointing fingers, it's drawing attention to what is inside of us all. After all, some of the most sexist people in the world are women. We all receive the same messages about who is strong and who is weak, as a general example.

Besides, the first step to changing something is to identify all the problems, accept they're there and need changing and then do something about it.

I think one very interesting and telling perspective is that of trans people who transition and "pass". There are such subtle differences sometimes in how people treat you based on assumed gender, that you can only be made fully aware when you experience both. I've read more than a few accounts from transwomen who knew people are sexist but still had a shock and there's transmen who talked about how much safer they felt just because they're perceived as men, nothing more, how much more respected they felt everywhere or that they felt under less scrutiny at work, treated more fairly, etc and often this feeling came from super small things.