GUIs are discoverable, and have lower friction for first time users. Example : a video codec GUI will always be easier to use than ffmpeg. I still Google how to use ffmpeg after 10years , and I have to read the entire man page because I don’t know what I don’t know! Is there a newer, better option to this flag available? Like lame for mp3s (another great example), a man page which (used to?) start off with bitrate options, but at the end says; forget all that, just use --preset. Or imagemagick, which decides to go for undiscoverability gold and split their entire program up over multiple binaries so you now get to read multiple man pages! After you guess what the names of those programs are, of course.
Hell. Give me a gui for any unfamiliar task, any time.
Of course, were I encodig movies every day, I’d be singing a very different tune.
Edit: another example: I resize images about once a week and I still have to google imagemagick’s convert. I keep forgetting how to resize to known width, keeping height ratio. It’s so frustrating that I’ve just given up and sort of guess with % instead, until it’s close enough. Not to mention resizing to a desired file size (is that even possible? With a gui, at least I’d know if it were at all. Now I’m just tired of reading the man page. I give up. Imagemagick wins.)