Or, a more hopeful view, is that "ad targeting privacy" makes "privacy" be a topic at all in society, and that could be leveraged to acquire more privacy in more areas, as people start to realize what it actually means.
Problem is that "evil marketing companies" is a lot easier for people to believe in, compared to "evil government", especially in places like in the Nordics where people generally have a much more favorably view of their governments than in other countries (for better or worse).