I think I get your point, but I surely don't agree with it. Honestly, it seems that you are not really interested in dismantling Surveillance Capitalism, just afraid that "Big Fedi" will attract the attention of too many people, and ending bringing scrutiny to some marginalized groups you care about.
To put it less nicer words, you are not really concerned about privacy or Surveillance Capitalism, you are just worried about losing your echo chamber.