I’m thinking about my husband watching me use Mint. I am comfortable with the command line, I use Linux (and Powershell) professionally so I am quick to jump into the terminal to fix something. Everytime I do he complains that he could never do that.
There are still a few things you need to do in the terminal, like setting flatpak permissions - something many users will want to do - that would benefit from a graphical interface. Linux is almost as good as Windows or Mac in this regard but not quite all the way there.
Definitely read the original SecureAnnex article as well. The behavior of this software and the people behind it are damning.