There are just too many NBA players right, isn't there?

The rookies and young players nowadays develop so fast and yet there are so little spots in the NBA. It leaves the veterans to retire early or not being able to play for a team. I am sure players like Morris Peterson of the Thunder, James Posey of the Pacers, Rasual Butler for the Bulls, Big Z of the Heat (the player who might actually be able to give Dirk a tougher time in the Finals with his height), and so forth can still play, and yet they don't get to have playing time. I really like the mix of veterans and young players in the league, not just filled with players in their early 20's to early 30's.