Scientific consensus - no one asserted that it represents proof. You are wrong to say that scientifically it means nothing. I think you mean to say what Wikipedia says: "Scientific consensus is not by itself a scientific argument, and it is not part of the scientific method."
However from a societal point of view it is important, which is clearly highlighted by the attempts of the energy industry to promote the idea that there isn't a scientific consensus when there is one.
Obviously I take issue with the bits where you go on to talk about disproven theories and unreliability of models. You're veering off into that industry messaging which aims to convince a reader that the science we have is not solid enough to decide whether to act on emissions, which is completely false.
It's a recipe I hereby label the "global warming denialist's unscientific method":
1. Construct your own notion of how science works.
2. Dismiss climate science based on 1.
3. Convince yourself (and others) you hold a scientific position.
Two points: - consensus isn't proof, it's just a bunch of people agreeing with each other. Scientifically, it means nothing. The list of disproven theories that once had wide consensus is deep and rich in examples. It's OK to talk about a consensus, it's not OK to use this as a line of argument that something is true. - the IPCC models are woeful at predictions, the IPCC themselves have stated as much. It's not unscientific to express doubt about the models - it's unscientific to do the opposite.
The global warming movement isn't a conspiracy, but there are many interesting social phenomena that can be observed amongst it's ardent supporters.