I think one aspect of those players is when they got bored, like Magic, etc. they'd just do crap to try and mix up how the team operated. Bird would get more frustrated with his teammates than anything the defense threw at him. Because he expected them to adjust when he would do things like get triple teamed like that or randomly drive on the entire defense.
A lot of players today follow in the Iverson "get bored" = take crazier shots pattern. When they put themselves in those situations they're looking to score on it. Bird and Magic were looking to see what developed from them doing it.
Although they also trusted their teammates more. You can tell LeBron is still somewhat broken from playing with the Cavs because he'll still hold the ball back rather than give it to a 95% open Bosh or Miller/Jones at times.
Of course Kobe doesn't need teammates so he's exempt.