Isn't there reams of data on weather patterns too? I thought that like the weather, economic systems are fundamentally chaotic and thus demonstrably unpredictab

Isn't there reams of data on weather patterns too? I thought that like the weather, economic systems are fundamentally chaotic and thus demonstrably unpredictable. There's a whole field of math where we can create these mathematical models that simulate chaos and are fundamentally unpredictable. I was under the impression that Economics falls under the purview of this mathematical theory in terms of unpredictability. If I may ask, who are the people that do these predictions? What is there methodology and how do you know it's not luck?