FWIW you can now disable the other streaming services, they annoy me as well and just today found a way to do it ( Settings -> Online Media Sources -> set all to 'Disabled' ).
Plex for me is for accessing a specific server. Or maybe one more if I added it. It shouldn’t require internet access and shouldn’t break if internet goes down and the server is on my LAN.
It isn’t for grabbing some stuff off the Plex site.
