You're obviously correct here. But perhaps there are users who prefer stable packages on the desktop too. Corporate users most likely (yes, there are such users too). It helps with their security strategy and a development environment similar to their server.
To be very honest, I think the stable security-oriented approach is better than that of a rapid update distro. You should probably use an overlay package manager like flatpak, mise (for dev tools) or even Nix/Guix for anything modern. Preferably something with minimal installs and good sandboxing features. Please let us know if anybody has better suggestions to offer.