It all boils down to chip stacks and where you are in the tourney. I was once on the BB heads up against the other player and had around 90% of the chips and he pushed all-in. I snap called without looking at my hand, Why?
My reasoning was any 2 cards can win and it really does not damage my chip stack that much if I lose, he showed AK off and I turned over a 6/2 off.
He was laughing as we dealt the flop, turn and river but stopped laughing when I spiked the 2 on the river and beat him.
When he asked why I called without looking at my hand I said " if I had looked I would have folded and he would still be in the game, Calling blind took the decision away"
That's Poker!