I am not discussing the presence of fast lanes right now, which have their own problems. I'm talking about the literal prevention of accessing specific data because your ISP decides you aren't allowed to access it.
Without net neutrality, if my ISP sees I'm trying to access a political site that they don't like, they could just make half of all those requests fail. If they like a particular political candidate for office in my area, then they can prevent me from accessing all the other candidate's sites or reading a news story about a positive thing the other candidate did.
This is absolutely enabling censorship and yes we are discussing different examples but I do not need to demonstrate how your example is censorship when another example (that you said was a possibility!) does, if I am trying to demonstrate how this enables censorship. This is not a case of (All things prevented by net neutrality) but (There exists a thing prevented by net neutrality) that enables censorship.