That’s not how it will eventually work. Right now you can get cbs by itself for 10 bucks a month. You can get hbo go for ten bucks a month on any platform without having cable. Eventually channels will be sold separate but not sure if the costs will save you much.
Exactly when cord cutting you have to net the extras you already pay for. I have 300MB internet at around 99/month. Cable bill about 240 with phone, and includes HBO/Showtime/Cinemax.
Then I have
Netflix
MLB.tv
Hulu
Amazon Prime
And I have an IPTV service through Pled which has a LOT of content for 12.00 month. That is probably illegal.
The user base will be, if it’s not already, as knowledgeable, prepared, technically astute and reactive as the broadcasters. Kodi and similar are already giving rightsholders fits since they steer entirely clear of the business model.
Is it legal? No. Is it happening anyway? Yes. Is it getting easier and easier to use - even easier than using a cable or dish set top box? Yes again.