Doesn't your narrative just confirm then that "working with computers" has always been related to social norms? Women were placed there and performed as well as any later man(hence many notable women in early computer science).

When ceos started realizing the potential social and economic power of the magic typing box it was no longer socially taboo for men to operate them. Of course, no self respecting business elite man would use one, only dirty hippie social rejects.

That's what makes the whole thing extra sad. For the longest time silicon valley types had to deal with being social outcasts in the business world. Rather than learn from that to be more inclusive they just took up the mantle of the business elite they replaced and perpetuated the same system of prejudice. In fact now that I think about it part of excluding women from the profession might have been an attempt at self preservation. Early tech people knew they were already looked down upon, if they didn't amp up the sexism to make it clear they were real men they would look even weaker to their east coast elite superiors.