The other day at my home game my friend raised from utg and I moved allin with AKs. He took your advice, thought about the situation, and after 45 seconds he called and flipped over AA. So I guess your advice is good.
But seriously it makes sense... I look back to the few MTTs I've gone deep in (don't play many) and I busted with ~15 a few times because I didn't think things through....