Meta employees have some of the strongest bargaining power in our industry. This particular imposition is undesirable to almost everyone. There is no upside in it for employees.
Therefore, if Meta employees can be forced to accept it, everyone will be. And you'd better believe that there will be a flood of companies happy to set this up for your employer at your workplace.
That's why, as someone who wouldn't consider working at Meta for ethical reasons, I'm hoping this pushback succeeds. A win for Meta here throws the floodgates wide open. A loss helps put the brakes on a bit.
Furthermore, collective action that starts like this (and keeps pressure up) is much more effective than a bunch of individuals quitting their jobs. That's why employers would much prefer the latter when they're up to no good.