Yeah, this is the case if you're a heavy terminal user. However, for a lot of people this is no longer necessary.
For a lot of people where just stock #gnome or #kde is good enough, and you use the software store app to install applications, you rarely have to touch the terminal and as such don't have to know the commands.
That being said, as a heavy #neovim and #emacs user, the power provided by actually knowing the commands is something that I could not do without.
I do a lot of copying and pasting as well, but what works very well as well is hitting control+r. When I found that out it sped up my workflow by quite a bit.