I think people are missing a huge point in posting builds and asking for advice, or even asking for a build, is to learn things about a set or powers that may not be obvious or easy to understand by playing it or just looking at raw numbers. It's rarely about someone asking others to make a decision for them, it's about gaining new insights or perspectives on a powerset combo so one has more information to make decisions that will benefit them the most.
I may not use a person's suggestion if it doesn't work for me, and they may not use my suggestion if it doesn't work for them. But by sharing our own views and discussing such topics we are enhancing our own knowledge on the subject. Other's opinions on builds are a tool to help me maximize my own fun, much like Pine's, or the forums, or Paragon Wiki.