Schools are either public institutions (tools of the existing state) or private (tools of capitalists), workplaces could not more obviously be the responsibility of capitalists, by sects I assume you mean religious sects, and those are famously also tools of the state for the oppression of enemies of the state or the scapegoating of minorities.

This “human nature” thing your on is a non-answer, it’s a declaration of defeat without the slightest bit of critical inquiry.

It’s like looking at the genocide in Palestine, being asked the question of “What can we do about this violence?” and saying “Well, my brother gave me indian burns growing up, so I guess violence is human nature and therefore there is nothing we can do”