Many admins are lazy, and they expect their software to run well on sensible defaults, most won’t care and just go with whatever the devs consider to be fine. By choosing wether Meta is blocked or not by default the fediverse will have to take a stance.
Do we allow extremely powerful corporations that want to monopolize their influence but we get a user surge in the short term.
Or do we block them by default and anyone making an instance should make the concious choice to join the corpo-verse themselves so we can continue to foster a healthier alternative to whatever they are cooking.