It sounds dumb, but I think a lot of the 'vague nuance' around considering people's availability schedules could be addressed simply by stating some reasonable

It sounds dumb, but I think a lot of the 'vague nuance' around considering people's availability schedules could be addressed simply by stating some reasonable guidelines and pinning it to a slack channel. As a technical person, I roll my eyes at HR stuff, but this is at least something small and easy. At least, then it's somewhat harder to hide asshole-ish behavior behind feigned ignorance. And if all else fails... better to explore what else is out there than stay in a bad situation if it's replaceable.