Tom, the sad reality is that the cause of majority of fatal accidents is not known. There are usually only speculations. So I am curious which fatal accidents in recent years you have enough data to conclude they were due to poor airmanship, and where do you get this data. Certainly not from most NTSB reports.
In fact, most of the incidents which were clearly due to poor airmanship or unnecessary risk taking that we know of are the non fatal ones.

Ramy