And I don’t say that lightly.
Why haven’t we cured cancer? The short answer is that the latest uncovered Rumsfeld Unknowns are pretty scary.
Unfortunately, paraphrase a later quote from Dr. Malcolm, cancer always finds a way. Well, pretty darned close to always, anyway. If I believed that cancer always finds a way, then I would also believe that cancer research and personalized therapy are futile endeavors. I do not believe that.
Even so, the reason we haven’t cured cancer yet is because we haven’t figured out how to overcome the power of evolution. Until we figure out a way to do that, we will continue to make only incremental progress.
Not Unreasonable 