What I mean is, in Arch or Manjaro, how often are there already packages available for things that people normally want to do, versus needing to compile something manually or work around broken dependencies?
This extends to some closed source projects other distros don't include on principle, like Steam [1].
Additionally, the AUR is basically a wrapper around "manually compiling" where users can submit scripts to do it for you. If you install a helper like `yay`, it's as seamless as installing from the official repo and extends coverage to things like the OpenTTD modpack I play [2] and its latest git commit [3]. That said, the AUR is still ultimately running user provided scripts so do make sure to take the offer to read the install script beforehand, most are maybe 5-10 lines.
[1]: https://www.archlinux.org/packages/multilib/x86_64/steam/