If I’m actually onsite, my employer has tremendous control over that. They can play the music they want and ban headphones. They can put a bunch of informational literature all over the bathrooms (this is a thing Google does/did). If I start getting paid for the commute, suddenly my employer has the ability to start controlling that.
You and I agree that commute should be paid. What I think you’re lacking right now is my point about the commute being controlled. If it’s paid, it can be controlled, and that’s something I’m personally not comfortable with.