If I wanted to join a network separate from Facebook, why would I want that network to have access to my Facebook?
Possibly because that network offers thing that FB doesn't, even if you don't have a problem with it.
People join new networks to get away from Facebook, not extend it into every sector of their lives.
Are you sure you aren't attributing your own personal opinions to others? Not wanting to login using FB has other possible explanations, like not trusting the new site/app not to spam your friends. It's not necessarily trying to "get away" from Facebook.
Possibly because that network offers thing that FB doesn't, even if you don't have a problem with it.
People join new networks to get away from Facebook, not extend it into every sector of their lives.
Are you sure you aren't attributing your own personal opinions to others? Not wanting to login using FB has other possible explanations, like not trusting the new site/app not to spam your friends. It's not necessarily trying to "get away" from Facebook.