You can install it on your normal, average Arch installation anyways. Don't need to rip everything out from the root just for a pre-configured meme distro. It's not as if Omarchy had hard forks of all the software it steals, anyways. It really is just dotfiles.
Even divested of emotional arguments, "LARBS but in 2026" is the sort of deliberate toe-stubbing that people should not recommend. If you're using Hyprland without knowing how to use Hyprland, you should either 1) be using KDE/GNOME or 2) pin every single system package that you install. Hyprland does ship breaking changes, you can update your system into an unrecognizable mess.