I much prefer managing my own contrast levels. Always have.

The product of all these attempts to do things for people results in a mess. It's one of those, "if only everyone would..." scenarios. Fact is they just won't.

All that said, leaving some room makes sense. That's likely in the median of the mess and not contributing to it all that much.

macOS doesn't suck at all. It's the device performance being exemplary and people not realizing what that means that sucks.