I find it quite amusing that the press always seems to find something or someone to blame.
If the helmet had 2 screws more he would have been fine. How do they know that, are they willing to sit in a F1 car going 100+ MPH whilst getting a spring fired at their head at 150mph+ to find out? I wouldn't think so.
What's the chances of this accident happening again, 1 in a million?
Personally I think they'd be better taking a look at the cars to see if they can improve them more, so that parts are less likely to come off of the car.