The reason why I put economists in quoatation mark it's precisely because most modern economists, that lean to any school, hammer their models to fit their theories, and have pretty much no practical value when you try to apply that in a real scenario with infinite variables. Unlike the hard sciences you mentioned, where every theory and model is subjected to intense scrutiny.

Meanwhile, real economists, with a proven track record: https://en.wikipedia.org/wiki/American_School_(economics)