They didn’t really care about it before the Mac App Store either.
The OS and its libraries just aren’t designed for high performance gaming the way MS has put time into that on Windows.
They have Metal, which is supposed to be nice. But that’s their Direct3D. Where is all the other DirectX equivalent?
From what I’ve heard anecdotally that seems to be a big part of the problem. It’s not just that they don’t have Vulcan (which I think is a red herring). Or the GPUs were abysmal (they were on most models before Apple Silicon).
There’s no whole-picture. Just pieces.