Anthony
Your premise is wrong, there's only one layup hole on the front nine at Pebble Beach, it's number 8.
Holes #1,3,4,and 6 are not layup holes, there is nothing about the design of these holes that forces the player to "layup" short of any hazard.
Players may choose not to hit a driver on a Par 4, 380 yard hole because they see no strategic advantage to doing so (Hole #1). Then again, they may choose to hit a driver off the tee on a Par 4, 404 yard hole 60 yards left of the centerline and lose the ball in 3 foot deep rough (Johnsonon Hole #3). It's possible they might even elect to hit an iron 220 yards into a fairway bunker like Woods did on the 331 yard 4th hole. These were not layup shots they were strategic choices each player has the option of making. You might also have noticed that on that same Hole #4, Johnson hit driver right, and into the ocean and Mickelson hit driver (or possibly it was a 3 wood) on to the green (then 3 putted). And how in the world can you call #6 a layup hole? It's 352 yards from the back tee to the end of the fairway. These holes give players strategic choices, the element so many on this site wish most courses would provide.
You are right about Hole #8, however, unless you can drive the ball 400 yards, you have to lay it up on top of the cliff.