Eh, you really can't. Linux without the terminal only enables about 5% of the functionality available the user.
Linux geeks like to imagine a hypothetical "average user" who never needs to adjust settings or install anything beyond a web browser. But a person looking for that limited of functionality while also knowing how to install an operating system is not an average user.
I disagree. I've used KDE's discover thingy to install stuff basically through dnf on fedora.
It's incredibly possible for the average user, who basically just browses the web and maybe writes documents.