The fact that "ring culture" has reached the stage where the 7th man thinks it means something that he was lucky enough to be on that squad.
Kuz played fewer minutes in that run than Alex fukking Caruso and was probably less important to them winning than even Dwight or Markieff. He was basically a replacement player.
Kuz was obviously angry that Dinwiddie shytted on him so much, but his comeback didn't say much more than "I'm angry". Dinwiddie is a better basketball player than Kuzma is, full stop. And whether he was spotted wins or not, the Nets with Dinwiddie as their #2 are still a way better squad than Kuzma's Wizards are, so what does he have to talk about? Kuzma's never even started in a playoff game in his entire career.