It's just politics... Replace "open internet" with "land" and imagine countries (ie people) are attempting to block others access to some resource. It was naive to assume that the internet wouldn't adhere the nature of our reality.
Instead of Napster letting you download any song anyone ever bothered to digitize, we now have a dozen different music streaming services giving you access to the music from whichever publishers they managed to sign deals with and you have to pay a monthly fee and can only use a number of devices at the same time and not share with friends and family unless they also pay for the access.
Yes, of course there are good reasons for this: without paying, the artists don't get paid and that means making music becomes no more than an expensive hobby and yadda yadda but that's my point: we may have corporeal justifications for the scarcity we impose on the Internet but the scarcity exists and we deliberately created it and use the police and military to enforce it.
In my experience people are more than happy to share if left to their own devices.
Simply, put, politics is not limited to matters of finitism. And the example I gave, is a perfectly fitting example of where politics is evident.