>>107096718 (OP)
Those who care about security. The Linux desktop generally has a really poor security model, with many distributions not even shipping any Mandatory Access Control solutions. Debian is a tiny bit better in this regard, but AppArmor is still complete dogshit, and you still have outdated packages, no application sandboxing, a mutable filesystem, and plenty of setuid programs.
If you want security, you're going to choose something like Secureblue, because it does proper kernel and userland hardening, removes setuid binaries, it has an immutable filesystem, it uses Flatpak which sandboxes everything via seccomp-bpf, and it has SELinux (although Fedora's default SELinux policies are still dogshit, because this is Linux, after all).
You might as well use Windows if you still use tradiitonal Linux distributions.