in case if you don't know, there are ATP points awarded for non-slam tournaments as well.or players who play the most tournaments of the season mixed with the best players.
dimitrov, davydenko and zverev winning this shows how meaningless it is. none of them have ever sniffed a slam.
and again, in case if you are unaware, there are rules how the points are calculated. So, a player that theoretically plays 40 tournaments per year, won't have advantage over someone who plays only 15 tournaments per year, but goes deep and wins 2 slams.