I'm gonna knee-cap this entire issue for you. You're talking about something that exists, at best, only in theory. In practice, except maybe for the largest firms like Google, it's not a thing.
I don't work in the Video Game industry. I work in robotics (still, computers). At least on the software side of the game industry (not the art side) people do jump around various subfields in the broader industry.
You want to make a stink about diversity hiring? You should make a stink about American production of qualified software engineers. It's a joke. It truly is. So much of the company I work at is foreign. Undergrad and grad school was foreign. My company today cannot hire enough qualified people to fill the team openings we have.
That's why I find it quaint to even discuss, or be remotely "bothered" by any kind of diversity initiative. It's not like the broader software industry is operating at a personnel surplus, particularly of Americans. Even with an enormous foreign born workforce, its a sharp deficit, and the best of the best people are hard to get.
And on top of that, nobody with a brain is seriously rushing to work in
Video Gaming of all things.
Go look at how many "Senior" engineering jobs Blizzard has open:
https://careers.blizzard.com/en-us/openings
Minimum requirements for a Senior Software Engineer?
"Advanced understanding of C / C++
A minimum of 3 years’ application programming experience
Experience working with game engines
Strong mathematics skills"
Jesus christ, I had that 10 years ago. Any 24 year old programmer worth a shit would (I'm 34). I've been programming in C++ since I was 14 for fucks sake. And I'm not even special in that regard.
But there the jobs are, and they linger. Because the video game industry doesn't remotely pay enough to be competitive with other sub-fields. In fact, you'd have to be out of your fucking mind to have a degree and /or post-grad degree and work for Blizzard. Love of game goes far. Wad of money goes further. I'd probably make half what I do applying to a video game company.
Before we get our pants in a tizzy about *gasp* a field with not enough people in it hiring based on ethnic, racial or sexual background in part, I think the much, much larger issue is why this country produces so many worthless MBAs and so few Masters of Science. Because that's the problem. When there is an actual glut of talent that'll be forced to take low paying Game Industry jobs, then maybe we can talk about how its sorted.