People use gpg because it is relatively auditable and -- unlike Signal -- is not funded by this:

https://en.wikipedia.org/wiki/Open_Technology_Fund

One can claim that the OTF sponsors encryption like Tor and Signal to help dissidents abroad. Maybe, but the list of organizations and people involved in the OTF are far from a glowing endorsement.

In that light, discouraging gpg and PGP makes me more eager to use gpg.

If having seed funding from the US military / government is a dealbreaker for your communication platforms, you should not be on the internet in the first place. Google “arpanet.”