I mean, yeah, there are reasons why you shouldn't use any given distro.
For example, if you want a macOS-like experience where you can do everything without ever directly touching a command line or configuration file, then Arch is probably a bad choice. But it is popular among people who want to get their hands dirty and fully control all aspects of their system.
The goal is to find the distro where none of the reasons-not-to-use-it apply to you.