Piers

The issue for the commenter you replied to is that they think that laying the blame for a specific incident at the personal responsibility of the people directly involved somehow means that the diffuse responsibility of wider society in creating conditions wherein those incidents are guaranteed to regularly occur is somehow no-longer relevant.

All that seems to matter in their assessment is who gets the finger pointed at them when the problem happens, not, why does the problem happen and what can we do to avoid it?

The driver can be personally responsible for their own failures without that alleviating the responsibility of good decision making by those who are responsible for ensuring people are able to live their lives safely.

It's so much safer to have an accident in a modern car than one from even just a few decades ago. There's no amount of better-than-what-we-have levels of driver awareness that can make up that gap.