The difference is that those teams won organically, with the exception of the Heat, and thanks to the efforts of the Spurs and Mavs I'm not sure I'd call them a dynasty.
The Warriors drafted Steph, Draymond, Klay. The Bulls drafted MJ and traded for Pippen on draft day... isn't that different than a team like the Dodgers just outspending everyone and buying championships?
They bought Ohtani, they bought Yamamoto, they bought Roki, they bought Freeman, they bought Snell, they bought Scott, they bought Hernandez, they bought Tucker. Outside of a few guys they just outspend everyone (which is their right and if the Cubs did that I'd be thrilled... but it's still bad for the sport). Then they can make huge trades because a team that has that kind of spending power doesn't need to prospect hug the way other teams do... so now they have Betts and soon Skubal to the mix. It's a well oiled machine that nobody else can come close to touching.
Parity is a good thing for sports. Fans should feel like their team has a pathway to a championship or at least a chance to be something other than cannon fodder for the Dodgers.
Btw I'm not suggesting a salary cap for MLB... I'm more so at a loss why teams like the Yankees/Cubs/Mets/Red Sox don't operate in this way or can't get their organizations to a point where they can compete with the Dodgers.