It's not the issue of share ownership, it's the issue of size and lack of process ownership, about everyone passing the buck and noone being personally responsible for these failures.

It's about the employees having an inverse incentive, to take actions just for the sake of it.

It's actually exactly about this attitude that somehow noone has the right to be on the platform, which, in turn, makes it easy to justify these forms of deplatforming and censorship, and the resulting self-censorship, too.