RBI is not meaningless. When it comes to evaluating an individual player's performance, yes, it pretty much is. So if there was a player the Cubs acquired who had 125 RBI last season, you wouldn't think that would be meanginful? as far as at the end of the day, meaningful for the outcome of the W-L record, it would be. But if a team playing on the royals didnt have as many RBI's as a guy on the yankees it means nothing if your comparing who is a better individual player.