In Little League Baseball, should an umpire be allowed to call a game for whatever reason they want?

Should an umpire be allowed to call a game if it isn't finished in the regulated amount of time? Little League rules state that a game ends after 6 innings or the umpire calls the game. Our local league implemented a time limit rule--games have to finish within 2 hrs. 15 minutes. If they don't make the time, the umpire is allowed to call the game. Isn't this a misapplication or misinterpretation of the original rule? I'm sure the intention of the rule allowing an umpire to call a game was implemented more for bad weather or a protest or a situation of that nature. I doubt it was implemented so a game could be rushed through before the six innings.