Yes. They're right about 50% of the time projecting only four days out. Forty years? Fuggeddaboutit.
Know this, then: there are countless master's and doctoral theses to be written, and they will be funded by this research. Grants, assistantships, and scholarships will be easier to get. No doubt politicians and the sub-educated activists will grab what they can from the work of these honest and bright graduate students, physicists mostly, but that should not reflect on the reputations of the scientists. Money should be spent on outer space research and development instead, but these are climate days not space days. Take what you can get.
That's been done - the problem is that the simulation can take on the preconceived notion of what the operator wants the scenarios to be. I think that some actual data would help. Besides, the earth's been around a while. 10 years is nothing.