The purpose is reflecting back to the test-taker what they like and want. Whether it's incongruous with their actual behavior is irrelevant, but people don't te

The purpose is reflecting back to the test-taker what they like and want. Whether it's incongruous with their actual behavior is irrelevant, but people don't tend to be dishonest to themselves about things like "introversion", not entirely. Self-therapy/exploration is one use-case alongside entertainment as you said. I don't think companies should bother with it, unless they plan to give employees what they want. On the other hand, the testing itself could be regarded as something that keeps the drones amused. It's hard to imagine another purpose.