Short version, there's a model that predicts weather better, but it is kind of apocalyptic so no one wants to use it and acknowledge it.
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There are other reasons besides it being apocalyptic that climate scientists might consider the model less useful than others. This video rebuttal to the video you posted explains some of those reasons quite well. The rebuttal is from Dr. Adam Levy who is a climate scientist. I mention this only because Dr. Sabine Hossenfelder, the maker of your video, actually has a degree in physics, not climate science. One should be very cautious when considering opinions of people who are speaking outside their field of expertise. While she may be an expert in her own field, she is not a climate scientist.
Late but... The USA failed to regulate 5G well enough. It would have forced telecoms to use steeper frequently filters that are more accurate like what is used in the rest of the responsible world. The 5G frequency band butts up against the hydrogen band used by weather satellites. (IIRC) The study that the FCC commissioned said something like a failure to isolate and protect the hydrogen line would set back US weather forecasting accuracy to around the level it was in 1970. As usual, the red jihadist party had absolutely no qualms about such a technological setback, took their political bribes, and failed to regulate to protect the hydrogen line. In their defense, radio is magic, and sky wizard didn't have any objections via thoughts and prayers.
Interesting, thank you!