Implies that people are always fine with having their cache busted and actually want to have a genuine conversation with you. Some aren't and will react negatively if you try.
While this is true, it also means they're not someone I want to converse with so it makes it easy to move on to someone more interesting.
Exactly, for a busy celebrity, having a canned answer is a polite way to acknowledge a fan and give them a little thrill. They don't have time for a genuine, heartfelt conversation with everyone they meet.
Indeed. Canned responses are a defense mechanism for being in awkward social situations. Making it more awkward is maybe not a great move.