Well this all hard is not about hard but about inconvenient. What can be done in windows by randomly clicking windows in linux requires knowledge.
Try to install windows without reading docs you probably will be able to do that, try same with arch.
Which is why settings in guixsd are in one file, because it is convenient, which is why it has docs on tty2 because it is convenient.
Installing arch isn't hard but it is simply inconvenient, sure you can install it, but what if you need to install it 5 times? You start to think about making a script, for things that other distro just let you click next to continue.