> I can even send encrypted emails with GnuPG without any problem, and it's as secure as Signal, if not better.
Alas this requires a fairly contorted definition of "secure" to be true. The cryptography in GnuPG has plenty of problems even if you insist on manually doing everything from your own CLI tools which maybe don't suffer the problems from EFail.
Mostly it's just kinda old, AEAD hadn't been conceived when Phil wrote PGP you know. That's a big foundational idea for modern crypto and instead PGP had to kind of fudge a separate MAC into the design and hope that's good enough.
When you send your GnuPG encrypted mail, how do you decide which cryptographic primitives to use? With Signal the whole _point_ of Moxie's decision is that Signal gets to insist on all clients having whatever the best option is, so that's always used. But in GnuPG you've got to guess, what might the other participant's client be able to handle? If you guess wrong then your email is unreadable, or, worse, bad guys might be able to read it more easily.
> in most other European countries as far as I know
In England at least SIMs are available in the pound shop. You buy a SIM with cash (a single bright coin) and it comes with a phone number. British people do not carry any ID as a habit, and I make a point of never having ID unless I've been specifically asked to bring it for a good reason (e.g. to leave the country or when I got a job that required security clearance).