i agree, and i'd add though that i think the rise of AAU and the one and done players has coincided with the money/ NBA salaries spiraling into the stratosphere - > the young players coming up want to win, sure, but the #1 motivation is money, and probably rightfully so. So i think the result is we're seeing a lot of guys who play well individually, get paid, and then (to a degree) sit back and enjoy it.
it's their job to do this, and their responsibilities really are to themselves, their families, long term - not really to a certain team, to how may championships that team wins, or to a fan base. So money takes priority over team play and championships in general, and so yeah, a team like the Spurs w a surplus of guys with a different mentality can thrive.