I’d say it’s mostly racism and that many other polytheistic religions are still practiced. That’s a political can of worms that western studios likely don’t want to deal with.

Short answer: racism. Long answer, racism and colonialism.

Yes, it’s definitely a problem. Folks are working on it. Lots of great new authors out there to read if you look hard enough. Ask your local librarian or bookseller for a hand finding stuff, they are great at this sort of thing. When I was looking for stuff for my kid a local bookstore turned me on to Rick Riordan Presents. The author of the Percy Jackson series made a publishing imprint that solely focuses on underrepresented mythologies and so far everything I’ve read from it has been great.

If you want something a bit more adult, Nnedi Okorafor has some really fantastic adult and YA novels that are based around Nigerian mythologies.

There’s lots more out there, this is just what’s at the top of my brain. I’ll try to edit if I remember any other authors or series. I’ve been on more of a sci-fi kick lately so that’s what’s in my brain right now (ps go read Murderbot Diaries if you haven’t already).

I would love to see African, any Indengious, Central Asia, and Eastern Europe. What do all these mythologies have in common? They’re not Anglo Saxon white.

The world was colonized by Western European countries who exported their preferred mythology.

Now, Greek, Roman, and Norse mythologies are now the default mythologies.

I think it’s often a western thing.

Rule of Cool.

Spartans, Romans, Vikings.