secrec > The focus therefore needs to be in educating people and improving the tools.
That's pretty much what Proton is trying to do in a different approach. If you use Proton and message someone using Proton, you don't need to care about the tools, you're safe by default. And if someone knows PGP and finds your key, they can email you, and when you reply Proton handles PGP by itself.
It is unintuitive and there is a learning curve, so people just aren't interested until they need to be.
In addition, PGP has many problems, e.g. no forward secrecy, so if one wants privacy then Signal is better than PGP.