Don't you have any issues with sending your detailed medical information to Facebook?
Signal, or even Telegram (despite it's stupid crypto, the E2E stuff _should_ work if verified right, and it's a marginally better client at the moment) should suffice without sacrificing privacy.
I totally understand the privacy implications, but I'm a person that tends to extern all its personal facts, so I'm kinda "public" by default, so no worry about sending what I talk about with even with strangers.
Privacy is obviously good but when I ask myself what specifically bad has happened to me because Facebook and Google know a bunch of random information about me I'm at a loss. Until the problem of privacy is tangible to most people it will always be an uphill battle
Signal, or even Telegram (despite it's stupid crypto, the E2E stuff _should_ work if verified right, and it's a marginally better client at the moment) should suffice without sacrificing privacy.