This is the exact reason executives favor return-to-office. Asking remote employees to assemble just 3 days per month becomes a major hassle, see above. If a job is work-from-office every day, the employees will either figure it out or quit, any other arrangement and the logistics of when and where to meet becomes a major distraction.
That's the whole point. The executives offer remote + 3 days together, and employees like alistair complain about the 3 days as opposed to the benefit of working from home the rest of the time. So the execs say fuck it, ok just come to the office every day.