Huck,
Let me give you an example of myself. I was playing Capilano two weeks ago, a course I had never played before. The 10th hole is a tough hole 465 ish, uphill, and I block my drive a bit to the right into the trees. I have 200ish, playing 225. I have just made 6 pars in a row. I have some branches between myself and the green, so to get there, I figure I have to hit a big cut 3 wood to get to the green or greenside to make par. I of course hit it dead straight through some trees, and end up on 11 fairway. Got lucky, had an open shot, hit it on the green, two putted for my bogey. Find out on the next tee that it was a par 5. If I knew it was a par five, I would have layed up and punched out (which I had done on the first hole in a similar situation, being a short par 5). Par mattered.
To your point, the moral of the story is I'm not smart. But you knew that already.
But I think Tiger doesn't lay up with 6 iron (or whatever he hit) on day 1 of the open at 267. He may lay up to hit something just short of greenside, but no way he lays that far back, smart or not smart.