CB. The funding aspect adds to the level of complexity. Ryan did it albeit a bit older as he needed to raise the funds to the point where the time was right, is my understanding (happy to be corrected on that).
Adding fund raising to the expedition effort increases stress exponentially. If Mum or Dad pay for it all, it makes it so much easier. Not many 18 year olds I know can afford to buy a $600,000? aircraft and travel the world by doing paper rounds, sweeping hangars or otherwise. Dare I say that raising the required level of funding would be more difficult than the trip itself in the modern world that we live in.
It's human nature to judge and we all judge efforts like this individually on their merit.