Typical Bungie logic . . . the rest of the game, which can be played any time? Virtually no grind whatsoever. Like, to the point that people are already running out of reasons to play, none. And then, in the one part of the game that is time-limited? Suddenly, there's grind. It makes no <blam!>-ing sense. Which means, in Bungie Land, it makes perfect sense.