I avoid using the terminal because it's just too easy to loose data. There are tons of commands that overwrite files, delete whole directories, or even overwrit

I avoid using the terminal because it's just too easy to loose data. There are tons of commands that overwrite files, delete whole directories, or even overwrite blocks on the disk, and very few of them allow for simulation and delayed execution like e.g. GParted does. You always have to triple check to not shoot yourself in the foot.