I wouldn't choose my Doctor, Lawyer or accountant on cost.
But most patients, litigants, tax payers do. Either because they are not doctors, lawyers or accountants and dont know any other way to choose, or because simply most people are cash poor.
And this is why IMHO, this repetitive thread is so silly. Most people struggle to pay for their flying and cant afford anything better. The ab initio student will end up with the cheapest option, or with the first school they are recommended because they have no way of assessing quality and safety, and the more experienced will fly the best ship they can afford. Hopefully by then they will have some idea about risk and the size of the envelope. It is a free world, just.