In fairness I've been fully remote for 10 years but I see friends during the day for coffees, lunch, exercise. And then multiple sports clubs in the evenings
But work is 40-50 hours of my week. That's a HUGE portion of my life. Almost half my waking hours are at work. (7x16=112 waking hours a week. 35-45% of it at work).
Not taking time to socialize during that period is draining as hell for me. I guess what I'm trying to say is you're way overestimating the percentage of people who can go to work and just... work. Most people need the socialization.
You'll have no commitment to come everyday, have people to talk to, and still hopefully be close enough to home to get back anytime you need pure calm or a full dedicated environment.
To note, for many people WFH means their family is around one door away, which makes it a widely different experience from people living alone.