It also seems to miss the point that you will always use something owned by someone else as long as you exist in a connected world. It's also why the problem exists: being together also means having to deal with conflicting directions and since you don't "own" everything your direction might not "win".
The same goes for getting deplatformed: if you are being nasty the problem isn't the non-governmental org removing you, that's a symptom of nobody wanting to deal with you. (or nobody 'big and easy')
Just because it looked good, or looked like a lot of people were 'with' you, doesn't mean it's true and doesn't mean it keeps looking that way if the barrier to entry gets higher. Hanging around in a browser and 'liking' or otherwise interacting/spreading things isn't actually a replacement for "a group of likeminded people sharing ideals", it's much more comparable to schoolkids forming groups.
At some point we might see a digital platform that is expensive enough and has a higher entry complexity to actually only grow and maintain people that are 'true' to the ideals fostered by that platform. Only then do we have an example that would be 'real' enough to converse about.