It IS a cloud service. You should be smart enough to understand why.
How many manual connections have you had to set up for your users? That's right, none. Why? Because Plex does it for you. That's that cloud part that you are so desperately ignoring.
https://github.com/jellyfin/jellyfin/issues/5415
Yeah, you should stop that right now.
Two of my favorites are streaming without authentication and the fact that it is possible for a non-user to create a user and then edit other users.