Yeah, most people are just trying to make it day to day doing their best. We are flawed but that is what make it fun.

There is also just a matter of randomness.

Marcus Aurelius was considered one of the great emperors of Rome with a fairly level head considering his position. It seems like he would have been an idea parent, so when his son Commodus came a long as almost the total opposite. It says something about human nature, it cannot be contained at times.