If he did take out a loan, it was more than likely secured against his parents house. It doesn't exactly display much maturity or decision making skills. If he loses his medical or job in the next few years, he not only has his own life ruined but others as well.
Well for loss of medical/licence can be insured against. Losing job a possibility obviously but unlikely at Ryanair I think...
Loads of people take out loans for flight training. Yes it is a risk but eventually, for most people (not all I grant you), that risk pays off. Calculated risk taking very much has a place in aviation, it is an integral part of it!