I can turn any link to my website into infringing content simply by changing uploading different content to the same address, thereby making anyone that links to me a criminal. So go ahead and make linking illegal. It'll be fun.
Yes, but it's likely that someone will always control cultural influence - either the current gatekeepers or the gatekeepers of tomorrow. That control might be temporary or intangible but it will always be worth something.
There is still another aspect where they retain control and can do so even with the internet and that's directing masses of people to be interested in their product over any other product. This fight is a great example.
In a world where everyone can publish without a gatekeeper, the prize goes to the person who can get the most attention.
There's a difference between following the advice of the president, and being forced to adhere to the president's will. If I was in charge of a federal agency, I'd be very interested in what the president wants even if I'm not beholden to that.