This is not a function of "could." They're already asking users to do it. If they "could," why didn't they? To make something easy, you first have to actually make it easy. Not let forum users argue about how easy it "could" be.
Surely you don't imagine that every product emerges in its final form?
Maybe instead you could explain why they couldn't. As I noted, people seem to be able to use TLS to make secure connections to websites without generating keypairs from the command line, or whatever.