Currently I work on internal security. Preventing hackers from stealing data, like[1]. I worked on GCP for a while.
My point isn't that my paycheck doesn't come from ads or that I've washed my hands from that dirty ad business. What I meant was that I don't really have internal knowledge about ads, I'm not an authority, and also I don't speak for Google's ad business.
However, after I posted my comment I realized my statement, while true literally, was misleading, because I did intern in ads in 2015, which I had forgotten about when I posted my previous comment. So I'm sorry for that mistake.
[1] https://en.wikipedia.org/wiki/Operation_Aurora