[pocket_titan]

I'm not sure where your idea about the "average experience in academia" comes from (I don't even know if such a thing exist, because the very word "experience" implies a subjectivity beyond the scope of surveys or other objective measures), but even given such an average more positive experiences do still exist in the head of the distribution. But concerning the point: even though my own experience in academia hasn't been exactly pleasant, my professors weren't the source of it (the "system" was), and always provided helpful advice and selfless acts of teaching, like the OP described.