When companies say things like "if you are not in the office three days a week we will penalize you at performance review time" they are inherently contradicting their own claims that remote work results in reduced productivity.
If remote work were bad, you wouldn't need to add an artificial penalty for working remotely, it would show up IN the performance data.
If you have to threaten people with artificially lowered performance scores for not coming into the office, you are admitting that performance has nothing to do with RTO.