Actually, people are that good. They invested a lot of time on their game, knowing their equipment and distances. With hard work and a little talent for the game, its possible.
If you are curious about how the best are playing, check out the various e-tour tournaments online. Those guys are good.
Once again there are tools they use, there are way to get into wgt and calm wind down, There not as good as you think, there are wind calculators. a 17 mph wind for them is the same as for me, or should be but yet they seems to be shooting 15 over. somethings wrong somewhere.