Why genes don't predict behavior.

http://www.scientificamerican.com/article.cfm?id=why-genes-dont-predict-voting-behavior

The concept here is interesting:  Could genes potentially play a role in the behavior of voting?  But after reading this article it seemed a bit like a waste of money to conclude that they don't.  This complex behavior or higher order thinking doesn't seem to have any predictive biological factors but rather environmental factors such as socioeconomic status, parental opinions, ethnicity, etc.  Thoughts?

- Morgan Eary