There is a big difference between
correlation (things that happen together) and
causation (one thing that makes another thing occur). What you have shared does not show
causation.
An example is this:
(1) Everyone drinks water.
(2) Everyone eventually dies.
(3) Therefor drinking water causes death.
The above statement mistakes
correlation as
causation. Drinking water does not cause death, even though everyone who drinks water eventually dies. They just both happen to all of us.
It is highly likely that persons who eat more fruits and vegetables also exercise more, don't smoke, do get more rest and are more conscientious about
their health habits than most of us. If this is so, then one would expect them to live longer and recover better than the rest of us when we are hit with serious illnesses.
If the information was scientifically solid, there would have been several supporting studies published since that one was in 2002.
Side note here - I eat healthier than pretty much anybody I know, yet here I am with stage 3c prostate cancer. The exception does not 'prove the rule', and it takes only 1 (one) contrary case to prove a hypothesis invalid. If substantial fruit and vegetable consumption was preventative for prostate cancer, I would not have it.
We should all eat a lot of fruits and vegetables anyway though, as that is part of a healthy diet and lifestyle.
