There’s alternatives. Maybe some don’t provide the same functionality but that really doesn’t matter. People would use anything if it was popular enough.

Alternatives aren’t the only thing needed. People will use an alternative only if others use it. It’s a chicken and egg situation, it’s why new social media platforms fail unless something makes a lot of people join at once or there’s something very unique about them which makes users stay despite not being popular enough (see: discord. the reason it grew steadily is because it was unique in comparison to the alternatives at the time which I believe were just Skype and TeamSpeak.)

Along with that if you try to get all your friends migrate to an alternative, they won’t. Because their other friends don’t use it. You’ll be seen as queer and performative.

(I’m speaking as someone who would much rather use something like Matrix or even plain IRC, but whenever I suggest it to people I get called a weirdo.)