The fact is that in the East, having 2 or 3 superstars is enough to guarantee an easy conference championships. For the last two decades, there have been 4-5 teams on any given year in the western conference which win 60 games (or like, 57 or 58). It's near impossible to pull off a first round upset, and teams with 3 or 4 stars can struggle to get out of the second round.
Take the 2004 lakers: They had Kobe, Shaq, Malone, and Payton. They made it to the NBA finals. But they had to upset the Spurs in the second round, and in the WCF, they lucked out and got a Wolves team which had lost both its starting point guard (Sam Cassell) and its backup PG (Troy Hudson). That wolves team had to rely on Derrick Martin (a 3rd stringer), Fred Hoiberg (a SG who hadn't played the point since high school), and Kevin Garnett to run the offense in 4 out of 6 games. And it would have gone 7 games were it not for Kareem Rush having the best game of his life.
Teams are fucking stacked in the west. Rosters are worn down by the time they reach the finals.
In game 1, klay and Curry were off, and Curry looked completely gassed at times. The East champions almost always come in relatively fresh. The cavs got blown out despite all this, while giving the splash bros easy looks. They're fucked.
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