Why should that do when you can do better? Why stop there? That would be like saying "post everything programming related on r/programming, that'll do. Let's ignore that there are more focused venues for my content".

Don't get me wrong, I'm not keen on getting tracked, either. But I can totally see that from a company's perspective, if you can make sure that only people who are interested in your product actually see the ad, that's better. You don't annoy people who aren't interested (not everyone in a rich neighborhood cares about a BMW ad, some already have a Tesla) and you increase effectiveness.