Because that is not what he's talking about. What is settled is that global warming is taking place and that human activity is providing the dominant forcing.
That of course isn't settled either. When you use .00004% of the data sample, you're not exactly arguing for something that has credibility.
Really? OK. All the Scientific Societies, all the National Academies of Science, and all the major Universities state that AGW is real, and represents a clear and present danger. Against that we have fruitloops like you stating that you know better that most of the scientists in the world.
Ask one what the cause was for the temperature increase about 150,000 years ago. Just an eye blink in the cosmic scale of global temperature history. Then when they can't answer that one, ask what the reason was for the rapid decline about 30,000 years later.
When you figure out the data they're using for their models is based solely upon the last few hundred years, you'll figure out that's a micro fraction of the history of the globe.
And you expect that to yield an accurate projection. And you're calling ME a frootloop?