One of the problems I noticed with people citing productivity statistics is that they always come from surveys of employees who are evaluating themselves. I don't know how many people are being completely honest about their own productivity when the remote work benefits are mostly aligned with their personal goals and not necessarily the company's.
Maybe there is a reason why so many more people in leadership positions are willing to return to the office compared to lower-ranking employees. They see a serious problem with productivity that doesn't show up in self-oriented surveys.