Arch can be run entirely from GUIs if you want that and so install them. There isn't one 'Arch GUI' no, but there's not really one '<distro> GUI' either, for your choice of value for distro. (At most some more exotic/niche ones might limit what can be easily installed?)
My point is that Arch culturally has an expectation that users will be comfortable with the shell. Perhaps you can run the system from the GUI once it's set up, but you have to get there which means setting the system up starting from a shell.
Yes, true, sure. Not to disagree with you, but just to say I'm pretty sure Manjaro (which is an Arch-derived distro with a bunch of packages/maybe bit of config chosen for you) can be GUI installed with whatever DE and probably never touch a shell just as well as Ubuntu or whatever.
Saying that actually you could achieve the same thing with `arch-install` which is now bundled in Arch's official images, you'd only briefly have to deal with its TUI option-based interactive installation, nothing manual.
