Len,
Your "aim out of bounds" comment would lead one to believe that you've never played St Andrews, is that true ?
There is a significant difference between a hook and a draw.
A draw does not have to be aimed out of bounds, merely to the center of the fairway, or right center of the fairway, or to be extremely safe in avoiding out-of-bounds, to the left center of the fairway.
Since a draw runs, and a fade or slice doesn't, the advantage of a draw becomes evident.
Many fades or slices, when confronted by the wind, become exagerated, thus bringing the out-of-bounds more into play.
Many, if not the majority of golfers, can't control a fade/slice in windy weather, making the draw the safer, prefered method of play at St Andrews.
High fades/slices in windy conditions usually end up with high scores and low ball inventory by the end of the round.