I believe the parent isn't disagreeing with you.

Breaking down the parent's post:

""" What's funny about this is that I think this is a legitimate and relatively non-evil use case. """ - parent is saying that fingerprinting so the advertisers know who saw the ads is legitimate and relatively non-evil.

It all comes down to lack of transparency/oversight and the option to exercise control as an individual. """ - parent acknowledges that not telling the user and not making it configurable can be problematic.