It's also possible that a lot of people who say they like working from home actually just like not being exposed to COVID. You seem to think there's no rational reason anyone would want to work in person.
Personally I actually like working in person, just not every day, and I don't like commuting. If I had it my way I'd be within walking distance of work and doing something like 2-3 days a week in the office. But as long as every business is still in the city and the trains are still shithouse then I'm on team full remote, even if that's not my "true" preference.