If we allow any government intervention, it should be to support the free market system.support the free market system.
If I go to the grocery store and they don't have a certain brand of milk that I want, then i will go to a different grocery store to get the milk. similarly, if my ISP won't let me watch netflix, then i'll go to a different ISP.
any government intervention should be to support the anti-monopolization of ISPs, instead of telling the ISPs what products they are required to offer
furthermore, if i start my own ISP and i want to block all porn content, or severely slow it down, why should i not have this right? if you want porn, then i would suspect that you do not want to be my customer. i'm not going to sue you for that.
What If I want content from both ISP A and ISP B? The direct and rapid response to this would be the emergence of ISP aggregators, that will serve the exact content that we want, at the exact speed that we pay for.
Why should I have to pay for porn to be streamed to millions of users, when I don't even use it?