Gaming was not socially acceptable for a long time. This lead to people who play games being ostracized, and then moving into the gaming industry. Here they find others who were ostracized for gaming, and it becomes an island of "misfit toys" so to speak. These people who were likely bullied or otherwise harmed for the formative years of their life don't want others to experience the things they did.
This is why "DEI" took off so heavily in games. The workforce by and large had shared experiences of being outcasts. This new mindset claims to elevate those who are marginalized. It created a galvanizing effect where the people genuinely believe they are fighting for whats right. Now they belong to a team, when they really haven't belonged to before.
This workforce is also highly likely to be online more than normal people. People can self select into their echo-chamber of choice which reinforces these beliefs. Now they can say "we are putting {representation} in {game}" and they will be cheered by the groups they've self selected into.
I cannot stress enough, these are almost all genuinely good people, who are convinced they are doing the right thing. Combine this with the way that gamers/internet people give opposing view feedback, and you can see why some dig their heels in. It's not something that's a simple solve socially as "creating an AI game studio".
This also ignores most of the economics of generating good games, especially anything that becomes an online service. There's a reason Tencent has their hands in everything.