The only peer reviewed studies that matter are anything from Randy Holmes Farley or before 1980
I feel bad enough, not just for JDA though.
but more so taking OPs thread down this road, this " debate" it has already been done / played out before in other threads regarding this topic.
But as soon as JDA declared himself as a "master hobbyist" I knew the constructive discussion/debate was over ITT
Please carry on.