Which distros exactly, and for which applications?
For the Debian based distros that I mentioned before (Pop, Zorin, Elementary), I've never heard of any normal user having to fire up the terminal. And by "normal" as in someone who doesn't have any special software needs and just uses Facebook, email etc, maybe ocassionally prints and scans stuff or plays games from Steam. And you can ask my elderly mother - she's been using Xububtu and Zorin for almost a decade now and never had to touch the terminal.