WFH only works if your company is designed around the idea. Transplanting the 9-5 into the home is a terrible idea, leading to isolation, loneliness and frustration.
WFH is not a rigid set of time but rather a fluid idea. Time spent =/= work done. There has to be a trust from the employer that projects are being completed irrespective of when they are worked on.
I should be able to weave my job into my life, perhaps slotting my work around parenting, early in the morning, during school and finishing late at night.
Finishing a job at 10pm isn't a problem if i've read my kids to sleep, already done the dishes and I'm in my pyjamas. A staff meeting might be us walking our dogs together in the morning or spoken over a pub lunch.
If I am expected to be sat in one place for 9 hours straight under the gaze of some busybody manager I may as well be in the office rather than sat alone, turning my home into a prison.