This video is by a defender of Man harms weather or the globe.
But around minute 29 he admits weather can't be predicted a week into the future.
Try to resolve this dilemma.
Predicting what the planet's, annual, average temperature will be 50 years from now is not the same as predicting the odds of rain in Chicago the day after tomorrow. I know you will say, "I know, I know", but you do not else you wouldn't have made that observation as if it had any bearing.
When you want to figure out the odds of rain at a given location at some point in the future, you have to look at that point's surroundings out to the distance that could conceivably affect the weather at your point of interest in your selected time span. You need to examine what is most likely to happen throughout that entire region. That will require looking to where the air is moving, how moisture levels are changing, precipitation, what the temperature and pressure isobars are doing and so forth. And it is much like a chess game. Such-and-such might happen which would lead to this or this other thing might happen which would lead to that. It is not a simple thing and that complex interdependence determining what will happen in a specific place and a specific time is the constraint that limits accurate weather reports to a handful of days.
If all you are interested in is the temperature of the planet as a whole, things may get bigger, but they simultaneously get much simpler. The Earth as a whole will take in solar energy and, as a whole, will radiate away infrared. That is all that has to be known to calculate our temperature in 50 years. The incoming is quite stable and predictable. The outgoing can be looked at a few different ways but benefits from the fact that there are limited and predictable changes in the parameters critical to planetary emissions. Greenhouse gases are increasing and we already have preassembled scenarios describing a range of manners in which that can take place. As the computers work through those scenarios, they will continuously update the Earth's temperature which, in turn, will dictate how much IR leaves the planet's surface and the speed with which it escapes the atmosphere. The emissivity parameters of the planet's surface do not change. The affect of water vapor due to increased temperature is calculable. There are no surprises. The flexibility of the planet as a whole is far less than that of the atmosphere surrounding, say, Chicago, particularly at the depth at which the two must be examined for these differing processes.
Besides, if the public were willing to take multiple weather reports based on multiple scenarios, it would be possible to give usable weather forecasts significantly further than our mandatory single stream does now.
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