They have far less failure points. Also, the AUR. None of them have anything remotely like that, which is also a big stability issue, but hey, it's bleeding edge, so you should be prepared for that.

Debian is more or less like RHEL/Rocky... with RHEL being even more stable and taking even less risks. They update only if they have to and only security related issues. Otherwise, RHEL is feature fixed. You have to upgrade to a new version to get a new set of libraries and applications. Debian... yeah, they're also feature fixed, but they sometimes update certain things that are required by most users, since Debian is also considered a desktop distro, not just a server distro.