"The hero turns out to be the expert in every inane field that turns out to be useful to the plot."
"Yes, all heroes can pilot small aircraft, including helicopters."
"Or use and Aqualung or drive like a World Rally Champion or parachute etc."
"Or speak every language necesary fluently, understand in depth the history of whatever country they visit, etc..."

Just because we're all underachievers, it doesn't mean that everyone has to be. Some people really enjoy their hobbies, and find another outlet for them.

David.