Magneto has to threaten the lives of thousands (if not millions) so that he can still qualify as a villain and his valid points can be dismissed. The same is true of all the other masterminds who want to shift the world from the status quo.

To be fair, maybe you're right and police in comics set in the United States from 2016 - 2023+ routinely escalate non-violent situations to violence and routinely kill people who are neither armed nor resisting, sometimes who aren't even responsive, and are then cleared of wrongdoing by internal affairs. Maybe police in these comics do over-police non-white neighborhoods and harass people on the street for no pretextual reason other than they looked suspicious Maybe in these comics houses routinely get breached-and-cleared by SWAT teams sometimes leading to the injury and death of whole families. Maybe police in comics are addressing homeless by raiding tent colonies with CS gas and batons, sometimes killing or hospitalizing children among their victims.

If they aren't doing that then they're misrepresenting the police across the nation.

And yes, maybe young people in well-to-do suburban communities would rather see superheroes punch the tar out of brightly colored crime clowns than face the real circumstances in their society. In capitalism, the house always wins.