Definitely a waste of company resources, considering these tests are online for free and as evidenced above, people are still quick to relegate applied psychology to the dust bin because it's not as reproducible as a mathematical proof. A lot of people also appear to be incapable or scared of structured introspection, so resources such as this are not universally beneficial. I have voted against using this method in professional environments before, but the HR people need things to do, so I've always been outvoted.
I do find validity in this test, as I do some of the astrological sciences, because pattern recognition is a thing (at least, it is one of the skills I tap most in my personal and professional life). I have taken this test at 3 different times in my life, including as a result of this thread, and received the same result every time - ENTJ. Every time, I have shared results with fellow students, coworkers, and, this time, my wife. Every time, people have agreed with the results as I am, as my wife so eloquently put it, the "most compassionate dictator" she has ever met. I'll add those notes to her file for the quarterly review.
That said, all archetypes (or the positions of planets) can do is incline, not compel. We still makes our choices and reaps our consequences. No inborn trait or heavenly body can circumvent that.