Because the studies compare:
-Extreme Deficiency
with
-Recommended consumption
and then somehow people come to the conclusion:
-More than the recommended amount is ideal. Particularly to an extremely excessive degree.
That is the problem with most people’s interpretations of the studies. It is like the fish oil studies that show EPA and DHA to be tremendous, but then people go and recommend >20g of fish oil a day and people start to have severe immune system disturbances because of the excess consumption.