> A well targeted ad can be a net positive to my life.

Have you ever bought anything based on a targeted ad?

I think targeted ads are a waste of my time, the advertiser's time, everyone's time. Because despite all the effort, they fail to advertise anything I would care for. At worst, they might advertise something that almost seems like something I could want, and then I dive down the rabbit hole and find out it's not what I want. Complete waste of time. Thankfully that's only happened once or twice (usually ads are so far off the mark that I can dismiss them on first sight).