Jason,
For staking out the course, its required. You are correct though, that hazard placement can't just go off those points without considering wind, uphill/downhill, etc. And, those TP's are from the back tees. With multiple tees, we can bring the hazards into play for a "typical" level of player. I have seen some USGA stats, and while driving distance is spread across the board, its amazing how they cluster around 260, 230, 190 and 145.
I design the centerlines from the back (290 Tees) tees just to make sure I have the real estate for the hole and place the other tee points based on those driving distances, and of course, site conditions.