Perusing the statistics, I am hard pressed to find a basement dwelling team that's so bad that they do not have at least one player among the league leaders in some strong category. And we're not asking them to start the game. Managers can even juggle their lineups properly to ensure that weaker players never even get to bat. Even "Joe Bumfuck, hitting .275 with a .790 ops at his position" can pinch hit for a pitcher, right?
By the way, I do not like and have never liked the "winning league gets home field advantage in the WS" thing. Like that's supposed to make them play harder?