It means that about half of the people on destiny have a k/d ratio less than 1. Fun thought experiment: Lets say all of the people who have k/d ratios less than one stop playing. This would leave only the good players. Do you know what would happen? Half of them would suddenly start having a k/d ratio lower than 1. Are they now worthless too? What if those worthless players then leave? Continue this until you have one person left playing destiny because everyone else stopped playing because their k/d ratio wasn't above 1. My point: Without worthless people (as you refer to them) you can't have good players which makes their participation necessary, which gives them value, which makes them not worthless.