The problem is lots of economists at least seem to think that what makes something a science is "using math" rather than "validating or disproving theories via observation". I've even seen people sneer "mere heuristics" at suggestions to try that...
[0] https://en.wikipedia.org/wiki/Credibility_revolution
[1] https://ideas.repec.org/a/aea/aecrev/v110y2020i5p1572-1602.h...
The economic literature abounds in observational studies that test economic theories. What are you basing your statement on?