hah well all analogies break down if you peck at them long enough. Twitter should have enabled developers to create great things on their medium vs trying to be both the platform and the app creator.
But the analogy doesn't break down. The value is in owning the medium. This is exactly why entities like comcast don't want to become dumb pipes. yes it is better for everyone if they do, but in their shorter term interest, it's much better to own the high value stuff.
It does breakdown. Twitter done right is a marketplace with network effects. ISP is an easily replaceable service. If I'm CNN I can't just pick up and leave Twitter for another Twitter at a lower cost. Same thing all the way down to a tech company with 10 people who use it to communicate outrages. People are already there. They expect you to be there too.