Ease of use, and actual secure and usable external access.

Friends/family make an account and tell you their account name or email address, you invite them to your library and that’s it, they can watch/listen to your media on pretty much any device they have. No vpn needed.

Jellyfin is not meant to be exposed to the internet for remote viewing. It also doesn’t have a client on most devices people use to watch tv/movies.