re: Is basketball hard to coach?

Past champions have the following: Spurs have the best power forward of all time, a point guard that's one of the best and probably he best all around player in the league. The heat have Lebron, bosh AND D wade. Lakers have Kobe, Gasoline and some with Shaq. Mavericks had Dirk and good role players. Bulls with Jordan and Scottie, sprinkle in Horace grant, and the best rebounder of all time. Lakers/Celtics in the 80's had the greatest players and rosters of all time. I am just really just asking. Seems to add up to great players and very respected coaches that know subs and how to command respect.