- Master Penguin5
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- Exalted Member
"You have no rights, play nice."
<3 Bungie
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In time, the tru7h will be revealed.
the covenant use their weapons because they come from the prophets, who get them from forerunner relics, so they are supposed to be holy items, bestowed upon covenant soldiers by the prophets. They only get weapons from forerunners. The forerunners didn't have bullet firing weapons, so the covenant don't use them. however, the heretics seem to have realized the same point you have here. also, covenant weapons are actually great against marines. the plasma burns and melts through skin, crippling and slowly killing the marines, perfect for the covenant's purposes.
humans do sometimes use covenant weapons, and pretty effectively. many spartans co in the books and sometimes in the games, one example being the truth and reconciliation level in h1.