Well, to a certain extent. The good teams will tend to win more of their games by larger margins. The larger the difference in the score, the more skill and talent become a factor. In one run games, randomness is king. It's not necessarily that the ability of the two teams is equal, but rather that their ability is not the deciding factor in the outcome of the game. Bad teams have almost as good a chance of winning a one run game as a good team.
In close games, things like missed strike/ball calls, bad bounces, a ball that was fair or foul by 1/2 an inch, a checked swing dribbler that results in a hit, etc. end up being the difference between who won or lost the game. These are things that have little to do with a team's skill.