"Lets say they played the 1st, 4th, 7th, and 9th best team in the West rather than the 1st, 9th, 10th, and 13th best teams in the East, their record would be worse!"
No . If the Spurs had to play the Heat, Celtics, Bulls, and Magic during the regular season instead of the Hornets, Suns, Kings, and Warriors, their record would be worse. That doesn't make the East > the West.
What proof do you have their record would suffer if they had to play more Western Conference teams other than "The West is better and it's not even close!" Based off the available sample size, their record would improve if they got to play more West teams.