Besides the Mets, who suffered the second-most injuries in the MLB this past year? HINT: If you answered "Cincinnati Reds," you're right! Four of our five original starting pitchers were down to injury by the end of the year, we missed Bruce half the season because of his broken arm, blagh blagh blagh who cares. Nonetheless, all that talent and look where it got the Mets. That is the real joke. I'm pretty sure ESPN didn't run a Not Top 10 of the Reds...
No, it does not guarantee anything, but it does give them a consistently higher chance of succeeding. You still have to play the games but you're more likely to win if you can afford better "tools" (take that as you will) than the opposition.