As my avatar suggests, I support the idea of using Free Software, online and off.
Comfort with the tools matters, too. If a person sees the transition from, say, Twitter or FB to Mastodon as a relatively painless one, great.
If they resist the change becuuse it is too "different", then you'll only attract the flexible ones. (Anarchists?)
I guess, then, that you have to decide if a shift to Freedom forces you to leave the comfort of lock in.
Do you feel you must stay engaged on FB to be effective, for example?
Will the group "stuck" there miss you badly? Will you miss them?
If you cannot draw the ones who are important to you, then you must make a decision. Not easy.
I've switched my focus, but my peripheral vision is still working.
I'm most comfortable here (for the time being), but I keep my accounts elsewhere.
As for "dispositive tools", I am going to read up on that one. I am not a lawyer, nor do I play one on TV.
It sounds like you feel you cannot be yourself in an important way because of the choice of online tool. Is that an accurate read?
If you decided to re-center your online activities with reliance on Free tools, will it also matter who is operating the servers involved?
If you have the skills, it sounds like you would do well to consider setting up a server or more from which you can federate.
@tellio you can see properteriy as a negation of #anarchism.
Minds.com I wouldn't use it. They implemented to much of these extrinsic motivational stuff.
The best I found sofar is #hubzilla. When using it don't think in terms of 'social network'. it's much more. It's a full federated cms incl. a social network.