It's more than that, too. Even when there are GUI things (like the network manager in my system now) the GUIs are badly designed (because it turns out that UX design is an actual, learnable, technical field!), and, further, inconsistent from one piece to another so there's little in the way of shared learning. When you learn one of these little GUI utilities you've learned ... that one ... GUI ... utility.

At that point you might as well be typing stuff like ls -laR ~/Documents | awk '{print $9}' | grep -v '^\.' | xargs -I{} file {} | grep -i 'ascii\|unicode\|utf' | cut -d: -f1 | xargs -I{} sh -c 'head -n 5 "{}" | nl -ba -s": " | sed "s/^/$(basename {}): /"' | less -N

(Fake command line supplied by long-suffering SO who got a kick out of making something incredibly stupid.)