Kuzma can be a clown but he's 100% right on this. The majority of former NBA players who become media members have some type of bias that they can't even pretend to hide. They either hate on this younger generation, have some type of vendetta against current players or are operatives employed to push narratives.
You just don't see this dynamic with former NFL players in the media. You don't see them slandering The NFL, If they don't have any delusional former athletes who think that they would dominate this era (or at least they don't say it on the broadcast every game) and there aren't any Kendrick Perkins like operatives tasked with pushing narratives.