Similarly, activism right now is absolutely relying on end-to-end encryption; Signal is hugely important to activists today. But much queer community building actually still happens in places like Discord, and Signal is highly centralized, and let's be honest, "just host your own Matrix server" isn't an easy ask for most people.
I think our engineer 
@dthompsondave put together the right ideas here with our Brassica Chat demo: https://spritely.institute/news/composing-capability-security-and-conflict-free-replicated-data-types.html
This is a demo, but it's a demo you can try in your browser. It permits users to go offline and come online, it has a design for moderation, without anyone being the central host. Nobody is hosting it because everyone is; there's no logical center. And yet, unlike a Blockchain, information can be forgotten, you don't have to hold on to everything, there's no proof-of-whatever. (And it uses capability security on multiple layers, which is important, but we'll get to later.)
If you have a fediverse account, you can quote this note from your own instance. Search https://social.coop/users/cwebber/statuses/116059478473332575 on your instance and quote it. (Note that quoting is not supported in Mastodon.)