I’m honestly perplexed what the FANGs are even thinking in being so aggressive about pushing an end to WFH. Sure it could all work out fine for them. Maybe employees will grumble for a bit, then settle back into office life. But maybe it wont’t . There’s a very real possibility that you lose a non-negligible percent of your staff (disproportionately the most talented who have other options), handicap your ability to…
This depends on how you define morale. Morale can be thought of as the willingness of people to make difficult sacrifices to maintain community ties, in the sense offered by the essay "Why Strict Churches Are Strong":
https://www.journals.uchicago.edu/doi/abs/10.1086/230409?jou....
In that essay, they make the point that there are no freeloaders in a strict church, and that is what draws people to strict churches. Strict churches will be smaller than non-strict churches, because non-strict churches allow a lot of members who do not participate very much in the life of the church. In a strict church, people obey a large number of rules, and make substantial sacrifices, to belong to a group in which everyone else is also making sacrifices, and therefore, in a sense, everyone earns their place. And by most definitions of "morale" strict churches have better morale than non-strict churches.
It's the same with any organization, including the military, and including corporations. Asking people to show up to an office means you're asking people to make a sacrifice to continue being a member in good standing. Such a request can weed some people out, but that is the point of the request. For those who are left behind, morale is higher because everyone is known to be making that sacrifice.
There are several qualifiers that are normally added at this point, raising questions over the fairness of the rules, the fairness of the enforcement, and the group perception of the fairness of the enforcement. I'm not going to write all of that out in a comment on Hacker News, I think the essay I linked to above covers most of the details.