I haven't tried a comparison of images made with it active in camera, but turned off in post-processing vs. ones with it turned off in camera. If it's different, then there's something else going on under the covers.
I definitely don't have a problem with someone using it if they prefer it, but it definitely doesn't align with my shooting preferences. I'd rather get the exposure "correct" and then have direct control over what happens with the image in post-processing. It's the same reason I always immediately turn off multi-point focus in point and shoot cameras in favor of a central spot. Ditto with the old auto tone curve function. I'm sure it's a psychological affliction.