

You don’t need to do everything on the terminal – even today, you don’t have to. But you should not fear the terminal, the same way you should not fear a piano because you play a violin. Windows also has a terminal, there’s stuff that tells you to go there to enable some Powershel things, and no one complains.
You don’t need years for a terminal, at least not for the stuff a normal user would have to expect to do with it (so eg.: not browsing files, that has good UIs already). But you should expect to have to learn something. We require people to learn and even certify their learning when they are to drive a car for example, and for computers we are not even askng 1/6th of that, even tho the last few decades show we maybe should.