Those photos and the report are damning.
That said, last week I was fortunate enough to fly in two different kit planes (owner-built) that put many (most?) of the US Big Four factory efforts to shame for workmanship and quality of finish.
As an industry we must be careful not to throw the baby out with the bathwater. The failings shown up in this event certainly need to be addressed but not with a knee-jerk reaction against all kit planes, home-builts or RAA generally.