Not really useless, it’s an extra layer of management (a good thing). The Proxmox system can be nearly static while giving you external level management of the OS that manages the containers.
I have a 3 server Proxmox cluster running various VMs doing different things. Some of those VMs are my container systems.
Besides, you can run containers directly on Proxmox itself.
No, he meant what he wrote: hyprland
Edit: https://github.com/hyprwm/Hyprland