The thing with assigning responsibility is that it does not ever solve anything.
Assigning it to individuals actually does prevent solving issues, since if you assign individual responsibility to a systemic problem, you get to - instead of looking for a root cause - say “people should just be better”. By attributing it to some individual moral quality, you get to avoid the hard questions - like “why is everyone stupid?” or “why is everyone immoral?”, and not realize the environment in which these people live foster the stupidity or immorality, and the only way to solve it would be education or higher standards for leaders.