Tailscale has native clients for all the major TV OS’.

No it doesn't lol. Only the extreme minority of people are using TVs that can even install apps.

At least I know the potential attack vectors for my Jellyfin server and can mitigate potential security concerns.

Yet on plex there aren't any lol. If you're opening your server to the internet, and giving other people access, it's not secure - especially via software like JellyFin where the devs even know and say it's not secure.