You're missing the point that WFH doesn't mean "all employees must WFH full time".

WFH is everything from "I gotta go home, the kid's sick" to "I'm going to WFH Wednesdays to concentrate", to "see y'all online!"

Exactly! That is what I have. I work from home about two days a week. The flexibility to work from home is what is golden. If my boss said "hey this week stay in the office," I am like can do. This also lets me visit inlaws and the like without using up loads of vacation. I don't have to worry about handling tedious things on weekends and it frees up my commute to do things like cut the grass. It is a win win.