How do you know that Damore doesn't care about diversity in tech? From what he wrote and has spoken about it should be apparent that he was putting forward reasons, when asked by people working on the problem, why the current programs had failed.

I find the Damore case quite odd, because if that's how people are treated when they seriously try to tackle the problem, then that creates a chilling effect on people solving the problem. You're much more likely to get half-measures that don't make it better.

As an aside, I think that a lot of gamergaters did care about ethics in videogame journalism. Obviously not all of them, but some of them. That's why even years later they talk about obvious bias in certain video game outlets. They're no angels and the community is changing, but some of them did care about the ethics point (or I guess it depends on how you define gamergater).