Older people vote X more than younger people.
You conclude that older people - presumably because they vote the way you do - are "smarter," and are "more tuned [sic] to the real world."
Finally you conclude that your explanation of this voting pattern is a "truism" - obviously clear, and beyond reproach.
Whereas your conclusion is not at all a "truism." Many, many other factors could account for this pattern. And likely there's peer-reviewed research into this very topic. Perhaps a Bluemoon member can point to scientifically vetted research in this area. I'd be interested in reading such analysis.