This comment from a former employee on the iOS team provides some more context around the software quality issues. I think this is the more interesting point around which we should have this discussion. https://www.reddit.com/r/apple/comments/7x0eif/how_apple_pla...
Based on this comment, it sounds like engineers are more like line workers. "EMs at Apple are powerless to push back. Every engineer's performance is tied to the number of Radars fixed and closed. Every EM's performance is tied to their team's total Radars fixed and closed, so they have an incentive to keep everyone focused on the prize."
The people who feel they are being ignored or feel they aren't being used to their full potential are going to look for someone or something to blame.
I'm sure there is some amount of "higher number of fixes is better" going on (any larger company has it), but i've seen poor team members read into things like this way too much in order to justify why they aren't doing well in comparison to others.
It may be true that apple weighs stats like that too heavily, but we aren't going to get a good picture of how heavily they weigh them from a few anecdotes.