Before this degenerates into a "my licence is better than yours" pissing contest, let's at least be clear that how an individual behaves has nothing to do with qualification per se. However, it is true that higher qualifications tend to encourage better behaviour, and they always equip the individual better as they require a greater depth of knowledge.
Yes, there are some very wise PPLs out there, but they are rare. Yes, there are some airline pilot cowboys out there, but they too are rare - the check and training system of most airlines sees to that.
The real issue is rich men buying fast, quirky jets and trying to operate them with the lowest possible qualifications and the least possible training.
I don't agree that "jets can sometimes do strange things at low speeds and high AoA that given the height they were at would have been non-recoverable" is a good excuse. It is up to the pilot to know EXACTLY what could happen during such manoeuvers, and plan accordingly. If he is uncertain, he shouldn't be attempting the manoeuver in the first place. There is certainly no excuse for entering cloud during an aerobatic manoeuver - if the wx isn't good enough, don't try it, or try it at an appropriate altitude.
The conclusions of this report positively scream "unprofessional" and "undisciplined". Trying to cover that up, or excuse it, is reprehensible.