To be fair, partly it is a way to qualify for government tax breaks and studio funding.

These orgs generally have a tick box way of qualifying where "having a cast and crew representative of this country" is one more thing which can push you over the line.

For example using Batgirl, the UK tax credit requires you to have a story about the UK, a story based in the UK, lead actors from the UK or a cast representative of the diversity of the UK. That film was about a fictional city, set in the USA, the lead was American, so diversity was pretty much the only box they could tick in that section. So did they cast a non white actress for the woke or for the money?

I've also worked for studios who have this kind of thing in their terms to release funding. I worked on a TV show in an desolate area of the country which very much had it's own culture and plenty of underused local talent and poor kids who could do with a break but the production had to ship cast and crew in from London (where they have plenty of opportunities already) to fit the studio's demand that the production match the racial demographic of the UK exactly to the percentage. Of course, in reality people aren't spread evenly all across the country.