We simply can't (and shouldn't) trust people who know what they are doing. In my experience, it is always better to trust people that don't know what they are doing.
How true these words are, even today.
I hope you never will, but should you ever need any urgent brain surgery just PM me I'll pop over and do it, and I promise I will absolutely not know what I'm doing.
As a much wiser person than me once said, "If you think education is expensive - try ignorance."