I've always thought this, in fact it just makes too much sense to me. I really think that while everything in this game is in fact rng, it's heavily weighted rng for bungies agenda. I mean plenty of people only still grind out this game for the last few items they can't seem to get, I get vex mythoclast like every 3-4th atheon kill while my friend who has done atheon like 2.5x more than me remains vexless.