It seems like unjustifiable hubris to assume that I'm significantly less susceptible to human error than the average person that decides to become a pilot.

I think you can take steps to inoculate yourself to some extent.

My father subscribed to a newsletter that summarized NTSB general aviation mishap reports when he got his Private Pilot license back in the late 80s. I read them too and was astonished at how many mishaps were very bad judgement calls made by pilots-- flying when the weather wasn't fit, not checking fuel levels, flying after having experienced engine trouble, etc.

I think it should be required reading for every new pilot.

If you're even thinking about the danger, it's absolutely justifiable to believe you're above the average already. The average person has zero regard for their own safety; governments have to literally force people to wear seatbelts in cars or helmets on motorcycles because they won't do it without threat of financial penalty.