Thing is, the AUR isn't really meant to be your primary repo. You can really get anything into the AUR.

The reason why I love it so much is because if I need a package that's not in the main arch repo (which tbh isn't many), then I don't need to bother going to some github page and compiling from source, I can just find it in the AUR and it's all done for me. I did this with things like goverlay and it's one thing that I immediately miss when I distro hop away from something arch-based.