Assigning individual blame is missing the point of improving the security culture in general

Do you hold that same opinion for the training and testing of pilots and surgeons? Do you want to step on a plane with a pilot who is only there because we are too nice to assign individual blame for his inability to do the job properly? Do you want to be going into open heart surgery in a system that dismisses the idea of individual blame when analyzing the outcomes associated with each surgeon? Having no idea if the man cutting into you, has previously had great outcomes or poor outcomes?

Yes and no.

Yes in general, because usually it's culture and not an individual failing. No in specific situations, because it's not just culture but also some people are just the weakest link.

Only focusing on either of these while ignoring the other is going to lead to bad results.