Denver simply a better team, specifically because they were more disciplined.
Game 1, DEN controlled the game, LAL stormed back but took questionable shots in a 1 possession game
Game 2, LAL controlled the game but resorted to hero-ball 3s when DEN stormed back
Game 3, every time LAL made a run they would sabotage themselves with turnovers
But in all 3 games, the constant was you couldn't really question DEN's shot selection.