I think some people want the idea of a service that's absolutely perfect, and anything with any flaw is just as bad as the actual bad thing. The likes of Signal and Proton aren't perfect, but they're so much better than the big tech defaults that the only ones benefiting from people shitting on them are the corpos we're trying to get away from!

More power to you if you can get all your friends to switch to the optimal self-hosted FOSS solution, but don't let perfect be the enemy of good.