Earlier quoted context omitted.
This is the first time I've ever heard a person worry about the quality of the ads that are served to them.
I've often wondered why nobody brings this up more. If you're going to see ads for things, why on earth wouldn't you want them to try to better target you? The whole point is for you to find out about things that might be useful for you. Why would I want less of the useful things? Why would I want worse advertising?
Even in a saner scenario, the most informative ad you can imagine will still isolate you from the information you would have got by doing your own research. But since you have most of the information you wanted to have, you won't bother checking that much more.
IMO even in the best case scenario, helping people to be lazy on things they are interested in is counterproductive in the long term.