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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In all honesty what pisses me off about farming at the cave is how mad people get when you go near them. All I've ever heard form them is "Go away you mother -blam!-ing piece of shit before i report you for being a fag!".