@jerryk
They listen. The entire Mac Pro situation is some of the most relevant and current information indicating that.
Additionally, there have been several anecdotes of bugs/issues/odd stuff getting discussed on tech podcasts that "mysteriously get fixed very quietly".
Do they guide their decisions based upon what the outside wants?
No - But they do know what people are saying and commenting about and the general feel of how things are being received and perceived, no question about it.
The whole Mac Pro situation is because they do not listen. Again, they showed that they thought they could build something that looked cool (Not sure why Ive's though a trashcan is a good look?). No one was asking for the trashcan design. No one. The fact after 4+ years they are acknowledging it was a screw up is good, but guided by dying sales as users voted with their wallets. But had they listened, it would have never happened in the first place because the design would have been more up-gradable.
As far as bugs getting fixed, that is likely the individual team members hearing about some bug. I have worked as a developer at a number of major tech firms, and more often than not, you just fix things you hear about without being directed by your boss and slide it into the release. You write tests for your fix and it goes through the entire test cycle so it usually works out OK. That is why it "mysteriously gets fixed".