It's not the commute that stops me- it's the "being on". At home I don't have to dress a certain way, sit a certain way, eat a certain way, etc
At home I'm either working or not working. I don't have to wear my public face. Wearing a public face is, if not tiring, at least irritating, like a mild itch you're not allowed to scratch, even though you could, but you shouldn't.