But it doesn't make Signal bad. If Americans blindly process our messages without knowing what's inside, it's worse than not depending on them, but better than showing your private correspondence to somebody.
At least we don't seem to have things which are close by UX and security at the same time.
Simplex is fine, but still feels a bit raw.
Everything else is either untrustworthy because of the closed code or no e2e encryption or custom encryption schemes (WhatsApp, Telegram, any Asian messenger) or unusable from UX perspective (Tox, Matrix).
I was saying that non-US office suites are good enough in terms of features, but people don't like to adapt to new things. WhatsApp vs Signal was an example where people don't want to use the better alternative, for no other reason than they can't be bothered to try it.
But even when talking about not depending on US tech, it is relevant: depending on open source US tech is a step towards not depending on US tech. The goal is not racism ("it's made by US people so I don't want it"). The goal is sovereignty ("if I depend on this, the US government can screw me").
Just look to the federal United States government using it for communicating military strikes, and including journalists.