I mean, you can scratch that up more to the war time economy than anything.
If all your young artistic talent is getting methed up, loaded into APCs, and driven into the thick of Russian winter, they’ll have less time to make art at home.
I might argue that the biggest thing we’ve done for the arts in the United States is to eliminate the draft. Now you can have a professional artistic community AND a professional military. Then they can come together to make the next Top Gun or Transformers or Marvel movie.