The average non-technical person is going to be stumped by the first "lock file found, cannot upgrade" error.
A modern Debian or Fedora with KDE is a breeze otoh, I set that up for relatives and my SO, and they're all more than happy with it. Bugs exist, like in all software, but the friction is way less compared to wrangling with Windows nowadays.
It's certainly subjective, but the amount of tech support I have to give has dropped significantly since switching the few people I care enough about to help from Windows to a mature Linux distro like Debian, while they are certainly not less productive.
Bit it's entirely possible, and common. E. g., uses of Linux in schools and governments are not more terminal-heavy for end-users than Windows setups.
Fedora on supported hardware does not require the use of a terminal for the kind of things people use Windows for.
Your bar has been cleared long ago.
(that's without even mentioning steam, chrome os, android, &c)
