Because farming gives you the same amount, if not, more loot then you would in a strike or whatever. Why go through the trouble of constantly dying, leaving teammates, and bullet sponge bosses when you have an easier time getting 5 times the rewards farming the cave.
Don't deny it, YOU KNOW ITS TRUE!!!
English
#Destiny
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Clearly most people haven't played an mmo that took a lot of time to complete. Complaining about not having the best gear in the game in 1-2 weeks in quite silly given the genre