You make a decent argument but... society doesn't judge that commute times or medical appointments should necessarily be reimbursed, so I think that there isn't

You make a decent argument but... society doesn't judge that commute times or medical appointments should necessarily be reimbursed, so I think that there isn't really a "sane baseline" to compare against in non-covid times. There's also the very real question of division of usage - most of us are likely working in spaces that intersect heavily with our private spaces (since we didn't move to our current residences with having a dedicated home office in mind) and that creates a pretty complex process to actually assign responsibility - it shouldn't be 100% in either direction, but it's hard to figure out how much of that time was legitimately caused by you working from home.