Crizotinib is a case in point. It is a small molecule that works very well for lung cancer, but only if a patient's cancer has a particular chromosomal fusion. This drug went from being a 'candidate' molecule to having gold standard data and FDA approval in 5 years. No fantasies about billionaires required.
The way you conceptualise a cancer patient's plight is also insulting and grotesque. They are not nihilists willing to try anything, who we can gladly sacrifice in our pursuit of cure. They have family and friends, and they really want to go their granddaughter's wedding next month and if you harm them with loosely justified bullshit science, you haven't helped anyone.