Is that the same Cleveland Cavaliers team that beat the San Antonio Spurs twice this year? Yeah, not that great at all.
The Western Conference is obviously deeper and has overall better quality teams. But, that doesn't mean the better teams in the conference can't compete with the Western Conference elite teams. Detroit was the only team in the NBA that beat both the Mavericks in Dallas AND the Suns in Phoenix. And, if Miami were healthy, I'm sure they would be in the mix and could compete with any team in the West.
So, sure, granted the West is deeper and has better quality top to bottom. But, if the Eastern Conference wins the NBA le again, that would be three out of the last four years. And, who cares which conference is stronger if the team that ultimately wins is in the "weaker" conference? Who cares if Dallas has the best regular season record, if it doesn't win a le?
Who cares which conference is stronger anyway? It's each team for itself. The NBA le isn't determined by the Western Conference all stars and the Eastern Conference all stars.