The thing is that the only way to properly assess skills when it comes to filmmaking is prior work. And it’s harder for non-white males to get that kind of work.
But again it comes back to a cause being why they don’t have prior work, which reaches back to why the school didn’t tell everyone about what is possible in whatever the example career was. Certain groups are pushed to certain things early in life - realising you’re not getting a certain job when you’re 25 is too late.
I don’t disagree, in fact I completely agree that’s part of the problem. It’s a systemic issue, it’s not just random studio’s fault alone, it’s everyone’s fault and everyone needs to work harder to fix it.
Speaking from experience, I know schools are making strides to be more inclusive and supporting of non-white male students, but that sort of thing takes a while to ripple into the real world. Meanwhile, there are still plenty of female writer/directors out there who hopefully will start getting more work.