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The barrier to entry to get Self Hosted Matrix working is unfortunately pretty high. Matrix is a great tool, but getting it working requires advanced skills and (in my limited experience) hours of troubleshooting.
That being said, I’m associated with an organization that wants to help activist groups self host matrix. If you know a group with need, check out https://rmfuni.org/.
Great! They can prefer that. Lots of people (most people probably) even need services, because they lack the skills and / or equipment.
That doesn’t change the simple truth of “the only infrastructure we can trust is our own.” My goal with that statement is to educate people as much as possible NOT to trust the third party services they’re using, even if those services supposedly care about privacy and security.
I’ve also seen a huge outpouring in recent weeks of people who are suddenly very eager to learn about and use self hosted infrastructure (or get access to someone else’s self hosted infrastructure). For some reason, I wonder what that could be. I’ve never seen anything like it in my life. I for one intend to encourage the shit out of it.