Sure. But when you ask "Do you want the police to be unable to do their job and live in a lawless hellscape ran by gangbangers and ISIS cartels?, the answer is also 'No.'
The problem is that the mass media sets the framing of acceptable discourse, and that mass media is in large part an ideological monoculture. And even when it's not, it is happy to present absolutely insane batshit lunacy as 'one of the two sides' of an issue.
> despite this being something practically everybody wants,
No, everybody does not want police accountability. Half the population will fall on a grenade to prevent that. They know that the purpose of the police is to keep the undesirables in line, and they never envision that they will ever fall in that category.
The brutality is the point for them.