But the odds of distributed gear being usable remains the same. Again look at the simple case of 3 people and three pieces of loot. Yes it’s 100% sure that one piece of loot is usable but it is also 100% sure that 2 of the pieces loot won’t be used. With group loot it’s possible that 2 or even all three could be used.
You’re arguing against math. You’re objectively wrong about the probability of any given piece of loot being usable