Great point. The word "science" appears in the name of the field that I studied, yet I haven't seen any evidence that our current hiring processes in this field are better than random (i.e., the null hypothesis).

If I made a software company who openly declared that their hiring process was purely random, would it work as a company? Would it be legal? For that matter, is a standard tech interview legally valid[1]? What if there is no known valid method?

[1]: https://www.hiresuccess.com/blog/facts-about-validation