It's not that complex if you know how, and the wiki will tell you how, but it is something you have to do from the terminal because Arch does not have a default GUI. Also, there is a bunch of stuff you need to install/setup/configure before you get to installing the GUI. The easier distributions usually have a GUI installer that just let you pick these options (most of which you'll probably leave at default), but Arch doesn't have an installer, GUI or otherwise, so you have to run many commands on the terminal before you get access to a GUI browser you can use to copy-paste stuff from the wiki.

First time I installed Arch I didn't have a smartphone and I only had one laptop at my disposal, so I had to print the installation guide from the wiki on physical paper, otherwise I wouldn't have any access to it when installing Arch.