As you shouldn't. I like my Doctor, and I do believe I found a good one who is as honest as possible. That said, my personal health is not the responsibility of other people; it's my own responsibility.
Taking the time to become as informed as I can, while simultaneously learning the intricacies of the science and medicine involved is something I feel everyone should at least try to do at some level. If only so they can create a list of questions that they would like to ask their Doctor in order to become further educated or to see if they're even competent to begin with.