Well, the joke's on those PHBs, because soon we'll have the data available in the form of aggregate performance data for companies implementing return to office policies versus those that have not. I do not foresee the results favoring the "everybody in the office all the time" model.
Do we then get to lay off large swaths of PHBs and replace them with people whose titles describe the actual value some of them can add and be respected for: clerk, administrator, evangelist, etc?