Why is it that someone is a troll the minute that one person does not have the same thought as the next. I think you're a troll cause you don't agree with me (yeah.... it sounds as stupid as it sounds to me too).
So lightroom has the ability to correct your mistakes, but don't you want to correct your mistake before making the mistake?
Now, we all make mistakes.... but, rhetorically... How about setting the white balance and even if it is good for one shot, but not good for another shot, then using lightroom? Come on... go outside your comfort zone.
I think what the other guys are saying is just use AWB and shoot in RAW and then there is no "mistake" you are just waiting until PP to actual make your choice of WB. Auto WB just means you'll make your choice later and at trigger time you can worry about things that can't be changed later. No trolling.