> Why do we have this idea that big corporations are these giant scary entities disconnected from real people?

Because they are. The corporate structure as well as the internal and external systems in our political/legal/economic systems are designed specifically to make corporations work as economic engines where risk, responsibility, and liability are distributed and diluted to the point it they pretty much evaporate. This means that corporations can do things like commit full on crimes, without any real person going to jail. Why? Because they are disconnected from real people by design.

I think this is a core reason behind the amount of public elation seen when the United Healthcare CEO was killed: people were happy to see an example of the piercing of a corporate structure carefully constructed to shield leadership from personal responsibility for its decisions.