> I take it for granted, like algebra, it's like saying gravity is bullshit. What other model is there?

I somewhat relate to their position. Something can be probably wrong, even if no better alternative can be proposed. I haven't seen a case in my personal life where the laws of gravity are off by any observable amount. Microeconomic rules felt broken at times.

Maybe no economic model works on everything in advance, and you'd need to first deeply understand situations before actually picking an abstraction, to minimize the denaturation of reality.