Leader's opinions trickle down to the public, unlike power/money. It's important to understand a person's bias because most leaders have a lot of money due to capitalism. It makes sense that they would support the means to their success and many people don't like to look at the negative effects/consequences of their decisions. If one bias is pushed too strongly, it can lead to extremism, division, and ultimately destruction. We've seen this with KKK, religion, Nazi Germany, slavery, etc and the Founding Fathers of America were very adamant against this. They tried creating a system where bias would be removed through democracy and today, we see rigged elections, gerrymandering, pre-chosen candidates, all too destroy our democracy to push their bias.