Culture is a narrative myth for us mere mortals to feel we have say in how NBA championships are won. More than any other league, talent wins chips. LeBron is culture. Steph is culture. Kawhi is culture. KD is culture.
Butler Bam is culture. Culture is wherever the best players are drafted or decide to play.
Miami has a great front office that works the margins very well. None of that would mean shit if they weren't located in Miami. OKC works the margins better than any other franchise in the league, but neither team has a superstar perimeter initiator on their first or second contract, which is the only way a small market is going to make waves.
And we should never forget how much luck goes into winning a championship.
The Heat were BEGGING teams to offload Dragic during the offseason and he's been their best offensive player during the playoffs. And Bam, who I've always rated, is suddenly playing like Draymond during those years when Draymond was good at offense. They pulled 3 rookie rotation players out of thin air, one of which involves brushing DV under the rug (CULTURE!!!). I don't care how good you are at scouting, that's extremely good luck. All that luck has them as pretty heavy underdogs for the finals, because if any of that regresses to the mean they probably lose this series. And that's OK! They still did everything (most things!) right this offseason! It was (mostly!) great process and they've been rewarded no matter the results! But they don't have players as good as LeBron or AD.
Plus, the Heat are already at an advantage in the bubble because they're used to having no fans during playoff games