It's not the gov controlling the internet, it's keeping business from controlling it.
It would mean the loss of net neutrality. What you see on the internet could be whatever your ISP decides. Let's say your ISP is Charter.com. They have a service called charter on demand. Well, they won't want you watching free videos or using some other service so they could throttle back your bandwith except for their movie service. They could also make it very hard to visit a site that does not make them money. Search for how to fix your car and you are directed to a car dealership that has paid charter to get you.
Loss of net neutrality is probably the greatest threat to bitcoin as well. It really would be possible and maybe even profitable to block access to bitcoin. The days of going where you want on the net would be over you will see what is most profitable for your ISP. And the dark web? Why would your ISP let you see that? In fact if your ISP was religiously oriented why would they allow you to see anything that is not Godly? It is really up to them not you.
Ok, I see where you are coming from. But what I don't see is where in the U.S. this is currently taking place or when any of the ISPs have ever stated that they want to control what its users have access to. The only real issue I have with ISPs here in the U.S. is the fact that they are charging so much for for a fraction of the bandwidth that many other countries are getting. I think if the conversations between the government and the ISPs were to focus more on that issue, then it would have my support. I still feel though that the ulterior motive here is for the government to have an open door, warrantless access to our private data.