Why? Because it makes power leveling a lot more enjoyable. I started with the Forsaken DLC during the final days of the Festival of the Lost; just enough time to grind for the horror story assault rifle, which, as you all know, dropped at max power level. I swear this made the power leveling so much more enjoyable, while still feeling like a grind on later levels as it should. Everyone knows that the power level is basically a number that unlocks new activities the higher it gets. It doesnt make you more powerful (except for iron banner); it is basically useless. Instead of giving the max power weapons at the end of a season, give them at the beginning. You will make your entire community happy and there isnt really a good reason not to.