I mean, I like mounting an SFTP server on my system and playing stuff with MPV just fine, but I host this stuff for my friends, too. Having something like Plex where they can use an interface that's familiar and easily watch what they want is worth it to me.
But then, none of us are watching porn on it, either.
The title matching is what made me go to Plex. Some shows were impossible to get sorted right on Jellyfin. Plus there's a lot more ecosystem around Plex