> What we need is for people to be happy

that is irrelevant to company management - in so far as that happiness has negligible effect on productivity.

However, from anecdotal evidence i've gathered (only sample size of 5-7 or so), in office has been more productive, but they (with the exception of one, who lives 5 mins from their office) all dislike RTO and would've preferred WFH; but not enough to quit over it as it's not a 5 day mandate, but a 3-4 day mandate.