I’m not actually sure where the idea that CLI is better than GUI comes from… youtube?
Personally, I use CLI. But is it better? Honestly, meh, its about the same?
Go with what you’re comfortable with. I use CLI because I’m very familiar with it. It also allows me to remotely log into my remote farmers using SSH and the command line, and be able to manage a headless (no screen) Pi4 farmer.
I’ve never used plotman so I can’t judge. As far as monitoring my farm…
watch chia show -sc
to check if I’m synced, and another terminal to see if proof are passing filters. And that’s it. I used to sit there and watch it update, now I don’t bother. These days I run a few commands to check everything is on, then log out and just let it run.
I like the flexibility of the command line. I like to integrate Chia’s commands into my own scripts for customised data output and automation. It also opens the door to other people’s scripts and programs that are command line only.
It is also, as far as I am aware, the only way to start partial services. With the Gui it loads everything. On the command line I can just load the harvester, or the node, or the plotter, with the GUI you get the whole lot. So in essence you get a finer amount of control over the Gui.
I also find that the GUI can be a little buggy at times. Sometimes actions in the GUI don’t do what they’re supposed to. Plots don’t show in the GUI even though they’re loaded. Takes up a fair amount of resources to run on a low powered machine etc etc.
But, if you’re not into working in a terminal, not doing any custom scripting, and prefer GUI, then use the GUI. There’s nothing wrong with it at all. Don’t let any of these CLI elitists haxors tell you any different. 

But once you really learn the command line… there’s no going back… 
