Right. Given that Vulkan and Direct3D12 have a very high barrier of entry, the way to get the most out of modern hardware is to leverage an existing high-quality engine.
A 'monoculture' would be bad, but I don't think that's a real risk. Also, Direct3D11 isn't going away.
Because game engines are for games. They fake a lot of stuff in their models.
The brilliance of humans is their ability to turn airports into Excel spreadsheets.
This bit of the thread is interesting - "The increasingly blurry boundary between games and life".
I'd say elections are going a bit this way, along with a lot of other stuff.