Our climate models are reliable for a world without progressing technology, they take into account a subsystem of the world without integrating the rest. This is why forecasts are so often wrong and humans are so bad at it.

Note: This is true of all forecasting in non isolated systems, not ragging on climate forecasts specifically.

Id prefer to believe in a simpler and more general forecast such as growth of computation, which shows a consistent and predictable rise over the years.