I think that's what the resistance looks like. It's certainly not enough in a big company to turn the ship, but in a free-ish market of employment that's really the way to do it. Eventually these companies will feel the result of their policies. It might make them better off and thus validate their policy, or it might not. Either way I think people need to act in their own self-interest with this. If you don't want to RTO, then bail. Obviously finding a job sucks and you might not be able to maintain your high salary (mostly for big tech engineers) but there are plenty of remote-friendly gigs out there.
People leaving tends to be somewhat of a positive feedback loop too. Once one person leaves, other people start thinking about it too. You can build a lot of momentum for change that way.