This entire debate has already been played out, probably word for word, when fancy tricks like overdubbing and triggers were new and exciting.
Sadly, there hasn't been a useful thing added to the discussion since people argued over whether overdubbing was dehumanizing the music industry, and I doubt there ever will be.
Music, like any other form of art, is entirely subjective. A particular technique or style isn't inherently good or bad. If you like it, great. If you don't, fine. If someone else wants their generic pop-rock Autotuned down to the cent and quantized down to the 512th note, they're perfectly entitled to do so.
Personally, I'd be interested to see how much editing various albums/bands have used - for instance, whether there's ever any studio magic helping Jon Schaffer or James Hetfield keep things tight, and if so how much.
Now, having said all of that, I think it's quite acceptable to laugh at any artists who use editing to compensate for sloppy technique, especially when it's noticeable. I remember seeing a video, a few months back, where some chick singer had Autotune cranked up *so* much that there was a constant robo-vibrato thing (think T-Pain, but shifting at about 120bpm even on held notes) going on with her voice - I refuse to entertain the notion that it might have been an intentional effect.