Well, speaking only for myself and the hundreds of folks I've taught to fly (who've [afaik] never bent metal, hurt anyone, or had to file paperwork) ... It's. Just. Not. (...that hard).From what I've heard? Mostly relying on bad gouge instead of following along during training.
Runner up: Carrying over issues from previous operators or types.
Second runner up: Not studying.
Third runner up: The attitude that It's. Just. Not. That. Hard.
Still, in fairness, I can totally see how it might be a thing for the Dunning-Kruger crowd. (an ever-growing problem as SM infects their otherwise, largely vacuous noggins)
The perfect pilot always maintains the perfect balance of confidence vs humility.