Guess you've never flown an airplane with some adverse handling characteristics.
Sometimes when you make your control inputs in a jet like the Eagle, the airplane does whatever it damn well pleases. Here's one such thing, which is called the "Bitburg Roll":
http://elementsofpower.blogspot.ae/2012/11/the-f-35-what-will-happen-while.html
The important point, especially in relation to the topic of this thread, is that the antidote to these types of nasty airplane habits is knowing they exist, and training up to the performance limits where those things exist.
If you know you can take the airplane up to that limit, and not go beyond it, and the airplane acts exactly as it should, it takes away the fear of such adverse characteristics.
Under the thought processes of some folks who cater to the "the most conservative option is always the best option" belief, they'd simply never go explore that area in the first place.