They are for you because you're a pro at it by now even if you don't realize it. You have to remember there are a ton of people installing Linux now for the first time ever. Some distros give a better out of the box experience. My guess is Cachy is popular with people that have heard Arch is great (because it is) but don't want to deal with a text mode installer, or enjoy the value add it brings to gamers.
> Arch is great (because it is)
It's good as a cutting edge OS but I don't consider it the most stable.
As someone who started using Ubuntu around 9.x sometime, basically had breakages every time I ran dist-upgrade, gave Debian (both stable, unstable and testing) a chance, hit more snags and finally moved to Arch Linux and been using it since 2017 without a single Arch-induced issue, I do consider Arch Linux the single most stable distribution, probably mainly because of the rolling release schedule if nothing else.
I used Arch for about ten years, and really appreciate CachyOS giving me great defaults, with the Arch Linux userland. I used to tweak my desktop a lot: nowadays I take the default KDE I can install to a new laptop in less than an hour with pleasure.