Nothing wrong with using GUIs if that’s your preference, but I think some people gravitate towards it just because they’ve told themselves it’s “easier”, when I personally think installing things using the command line is “easier”—you don’t have to navigate a GUI, figure out where they moved something because they changed the interface, etc, you just know what line to type and it is just a one-liner. It’s personal preference, but just don’t let the terminal put you off just because there’s no pictures. For instance, installing software from a package manager is an extremely easy thing to do on the terminal. Especially if you’re on an old and slow computer, it’ll be noticeably faster too.