i believe the maintainers stance is that jellyfin should not be exposed and it should always be behind a vpn
If you think most non tech people can just casually find an old pc, install and setup pfsense, then you are out of touch with reality. And they also would have to let it run all the time and have space for it. That's just not something realistic. It's not an option for my friends. Might also break chromecast.
If you want to make it super easy for non technical people also use reverse proxies to your tailnet so jellyfin/plex is reachable at like “https://watch.example.com”. Pretty much the only friction for non technical people would be creating a tailscale account and being invited to tailnet I guess. But you could also just do that for them I suppose with auth keys