I'm not sure it's that they're more "progressive" but that seems to point in the right direction. My own thought is that tech has relatively more "white knights" and also relatively more people willing to look at their actions affecting the world, even if it's sometimes a distorted view of changing it with a milk startup or whatever. Letting these things slide creates an uglier world to live in, whereas in other industries there's probably acceptance of the way things are or just a sense of being able to switch industries.

Currently I wonder which side will end up dominating tech culture or if we'll remain at war. Some companies have to send out memos telling people to cut out the sex in the stairwells. Others just don't hire any women and try to make sure they're not discriminating in a way that's illegal (not that hard with "pipeline" arguments, at least for core tech positions). And then others have some balance, and make it work or result in drama like this story.