My mistake, mistook you using the Durant situation as an example of coaching doesn't matter, but point stands, there were an incredible amount on talent on certain teams that don't win, because the styles do not mesh. I have no problems saying that Durant's level of cowardice was unprecedented, and I also believe they do not deserve any credit as some soft of team building genius, but as a team of pure dominance? The team was stacked, they can only be considered a dynasty, especially in an age where long terms dominance is tough to do due to the cap rules.
As for players not retain information, you make is sound like every team is the same, they are not. You cannot have the same system with Olajuwon as you have with Curry, nor can you have a Jordan centred system applied to the Bad Boys. This isn't a cut and paste exercise, there are many different ways to win, even though there are some basic required building blocks (talent, defensive and offensive systems, bench, etc ...)