I see what you're saying, but I don't think there's any universe where an advertiser will pay for traffic without any way to identify that that traffic came from an advertisement campaign
Let me use an illustrative example,
An advertiser selects middle class, obese, yet healthy minded people to receive an ad for their Fatboy Summer fitness campaign
The landing page of this campaign, is not the main site for a gym, but a Fatboy Summer specific landing page with a special offer etc etc etc all very reasonable. If you click on the link you want to find more information about their special campaign offer.
The fact that that landing page will be specific to the advertisement campaign is a given, it's just a necessity of the transaction. Knowing these two pieces of information, you know anybody who ended up at that landing page is middle class, obese, but hopeful about getting healthy.
This is why targeted advertisements and privacy are diametrically opposed