...Not one Apollo astronaut ever contracted cancer...
to which you reply:
Well, not yet anyway. Strangely enough this fact...
Two Apollo astronauts have so far died of cancer: Jack Swigert, of bone cancer in 1982 and Alan Shepard of leukemia in 1998. Leukemia is the form of cancer most closely associated with exposure to large amounts of ionizing radiation, though we have no way to know if Shepard's case resulted from the relatively modest radiation to which he was exposed during Apollo 14.
In any event, of the 24 men who have flown to the moon (12 of whom walked on its surface), 6 have died as of April 2010. 18 are still alive. These are not bad numbers for a cohort of ~80 year old men.
While it may be to late for the Apollo astronauts to get all the benefits, modern cataract surgery can result in better vision than before the natural lens became clouded. Isn't science grand. I have read that some people opt for the surgery prophylacticly, on the basis that it prevents cataracts anyway, to get the vision improvements of a corrective lens. A easily correctable condition like cataracts is certainly something I would happily risk for a trip to space.
For those who wish to maintain an illusion, ignorance is the best source of knowledge.
Yeah, ASTP counts as much as Apollo 9, but I'd count only the lunar missions when discussing the alleged effects of transiting the VA belts and being outside the earth's magnetosphere for several days.
Of course, many astronauts who never left earth orbit got considerably higher radiation doses than those who went to the moon because they spent so much time in space. The Skylab astronauts all got pretty high doses, and two of them (Conrad and Bean) had both walked on the moon. But Conrad died in an accident, and Bean is still healthy to my knowledge.