How was this "so preventable"? By not attempting to take off in the first place? Sure, that's fair, but you could also same the exact same thing about 100% of the commercial aircraft crashes throughout history, too. That doesn't seem all that helpful.
I'm not sure why "private pilot" was tossed in there as if it was an explanation. Being a private pilot doesn't automatically make you a Sunday driver, any more than holding an ATP makes you a sky god. I know nothing about the hours of the guy involved, but maybe he's got more experience than most FOs out there in regionals for all I know. Perhaps he loves flying but chose to take another profession because he wanted to pay the bills instead of having to find a rich girlfriend to pay the rent.
Do private pilots sometimes do things outside of their experience level? Sure. It happens. But it happens with ATPs too. Certain pilots from a certain continent across the pond attempting to carry out the dreaded visual approach, for example.