While your take is true for the pop psych personality ish this is /r/askscience

>"A major methodological stumbling block in the way of establishing the validity of any method of personality measurement is that there always is an element of subjective judgment in selecting or formulating criteria against which measures may be validated."

That's true for literally any model of anything. Factor based personality models continue to evolve with the data, but they have considerable support at the behavioral and neurological levels.

So much so that there is absolutely no way companies should have access to that information. I'd prefer a full body cavity search and 24 surveillance of my home. If those were my only choices