like 95% of riders i know whove broken a bike part will just throw it away and buy a new one. noone can be fucked chasing up warranties besides occasionally on dirt forks, or if its something that broke after a couple of months
maybe its a problem in your local scene/bike shop, but never anywhere that ive lived
although thinking about this, its more likely to be parents of young kids who broke part X by being a dickhead threading something out trying to make adjustments or equivalent, and then dont want to take responsibility but want it replacing