I agree. Having a home mortgage or children does not automatically confer upon anyone any special knowledge about political issues or world affairs; it just means that you know from experience what it's like to have kids or make house payments.
It's kind of like what they say about doctors. I have a couple friends who are going through med school and a couple of friends's parents who are doctors. They all say that, for the most part it's the young doctors right out of med school that know more than the doctor who has 20 years of experience. Why? Because the younger ones are much more in tune with the "latest and greatest" techniques, findings, research, etc because they HAVE to study it and the info is fresh in their mind. The older ones are only as well-informed as their own efforts outside of the hospital have made them.
It's hubris to think that age and experience trumps youth. I can guarantee you that any poly sci, economics or history students on this site know more about how the world works outside of their own lives than virtually anyone else on this forum. Why? because they are studying those subjects right now and if they are majoring in these areas then they clearly have some sort of passion for the subjects and probably spend more time thinking and reading about them than a parent of three who's more concerned about putting food on the table and making house payments. Such is the luxury of youth.
The flip side of that coin is that the youth tend to argue or view things in terms of theory rather than reality.