Ah, but there's an alternative hypothesis. Tech is an industry that people enter because they see a new world being created and want to participate in the making of it with their own hands. Finance, corporate law, so forth, not so much.
So it seems believable that tech is a place where you will find people sympathetic to do difficult, tradition-destroying things to build a better world, much more than finance or corporate law. (The way that tech has publicly embraced things from LGBT rights to non-college-degreed people, more than finance or corporate law has, is evidence in favor of this belief.)
Given that, the pressure on tech to do better than the rest of the world, and thereby set an example for the rest of the world, makes a lot of sense. It's not that tech is the most sexist industry (it isn't), it's that it's the industry that's most likely to get significantly better in a short period of time.
So it seems believable that tech is a place where you will find people sympathetic to do difficult, tradition-destroying things to build a better world, much more than finance or corporate law. (The way that tech has publicly embraced things from LGBT rights to non-college-degreed people, more than finance or corporate law has, is evidence in favor of this belief.)
Given that, the pressure on tech to do better than the rest of the world, and thereby set an example for the rest of the world, makes a lot of sense. It's not that tech is the most sexist industry (it isn't), it's that it's the industry that's most likely to get significantly better in a short period of time.