And, also, the "well it's the parents" thing, that shows that people attempt to only think of the most recent cause in a cause/effect situation. Their parents grew up in the same or even worse situations, so...? It's just a blame-deflection that was touched on earlier - basically, "I am/would be a better parent so my kid wouldn't have to worry about this - I DO have control!" A way of propping oneself up as opposed to empathizing with and trying to figure out ways to help the most people out.
Marvin, the issue is that since no place is perfect, everyone should strive to effect change in whatever situation/country they find themselves in. The U.S. has a lot of good things about it, but it also has a lot of terrible things about it, and a lot of people attempting to make things worse here for a lot of people as well. To affect those things, you start with dialogue (what were doing here) attempting to break down the source of the problem, and then come up with ways or work to enact change from the ground up when it comes to those things.
What we're seeing now is a public consciousness shift on how various things about police departments should change to mean that less people get screwed over (which seem to be disproportionately poor and minority). This is increasing because the voices that were ignored in the 70s through 90s are finally being heard a little bit thanks to the advent of video being everywhere and more activism about those and related subjects.
Just "voting" doesn't solve the issue because things like zoning and gerrymandering makes voting pointless for large swaths of people. Other types of activism would be necessary to create change.