But you are basing this on your personal experience. I work remote out of state from my company (and did so pre-pandemic.) I would often travel and stay at the office for decent periods of time. During those periods way less work was accomplished for me, because I was socializing more with co-workers, took more snack/water breaks, spent more time at lunch. While WFH I will still go out to local coffee shops to work out of if I am lacking focus for the day.

Some people actually do work better in a distraction free environment, but it seems you don't believe that. I should mention, my company has an open-office floorplan, so the amount of daily interruptions was quite incredible...