I have a different experience and believe that tech fields are extremely egalitarian. This might not apply to the specific regions like SV where tech and status often intermingles, don't know much about the situation there. There is probably also a difference between countries.

There are some very opinionated engineers, but they are an exception and quite rare. They might bark a little from time to time but it doesn't have any real repercussions.

Sure, if you are one of the few women in tech, you might face some difficulties getting into established groups, but that isn't due to sexism for the most part. Far more often it is some misplaced courtesy or something else in my experience.

Compared to medicine for example, tech is pretty harmless. Medicine has a lot of women, but that doesn't mean much. Surgeons for example are know to have their elitist clubs and it often is exclusively men. I have yet to hear similar "locker room talk" or what you call it in any tech circle. Probably exists but it has to be quite rare.

To my knowledge the diagnosis for tech was pretty much that there are far more men here. But that isn't indicative of sexism. So I don't understand what you mean by "extremely sexist" at all.