If that were true, then the software wouldn't have the ability to defederate built directly into it in the admin panel.
A setting in an admin panel is not a user facing feature.
IMO the point of any open source software is the noone really has ownership over what "the point" of it is. Anyone can take that software and use it how they see fit.
In broad strokes yes, but in more specific and relevant strokes, the point of social networking software is for users to use it to engage with each other, not concern themselves with how it's servers are administrated.