Companies that require RTO, if they actually want their employees to return to office, should prioritize in their messaging the objective benefits/cost to working in the office. No vague-speak, no shaming people claiming that workers "don't work" at home, but rather objective analysis on what exact benefits they seek to accrue by mandating that work that could be done anywhere in the world must be done in separate rooms of a large corporate office space.
Since most companies that are enforcing RTO aren't doing this, it only makes sense that it is a covert mass layoff. They just want people to quit because they were planning on culling the herd anyway, and would prefer it be a self-selection of those who aren't willing to put up with bullshit.
It’s an open secret that there is no data that supports RTO. If there was, at even one company, it would be screamed from the rooftops.
(I don’t believe it’s all covert layoffs either - it’s imho the more banal reason of c-level personal feelings and groupthink)