He is only paid like them because they signed their contracts a long time ago or in Crosby's case he is just a legend who would rather improve playoff odds than make a few extra mill.
Draisaitl just signed 14mill per. There are going to be a lot of players getting 10-11mill contracts in the future that are far below the Crosby/McDavid/MacKinnon tier. Nylander got the same as Pettersson around the same time. The narrative that he is paid like the top 3 players is only true at the surface level.
Btw, I am not claiming that he is playing up to the standards of a 11.6mill contract so far, just pointing out that his contract is a fair one for the player Pettersson is (hopefully is and not WAS)