Apparently, I’m currently a top 0.07% user, and yes, I frequently search for programming answers on Stack Overflow.
See, programming is such a broad field that nobody can hope to know everything. Even in topics where I have a lot of experience, like C++ or Scheme (both of which I have gold tag badges in), I can find other people who know even more than I do. Some of those people like to answer on SO. (Others tend to prefer IRC. That’s fine too. I will go wherever I can find answers.)