I don't think that's true. Musk, whose probably the most prominent billionaire funding space exploration, put about 100 million into SpaceX over a decade or so

I don't think that's true. Musk, whose probably the most prominent billionaire funding space exploration, put about 100 million into SpaceX over a decade or so. While the funding just by the National Cancer Institute just for breast cancer in just one year is something like 500 mil. The funding for cancer research seems to dwarf that for privately funded spacecraft. (plus, its not like there aren't any billionaires funding cancer research) Plus, I don't think its obvious that slow progress in finding cancer cures is due to resource constraints. Even if you showered 400 billion on cancer researchers, its not obvious you'd get a huge uptick in cancer treatment innovation.