I imagine a road-building engineer would think twice before approving a road with an unsafe design speed if it could lead to them being stripped of their license, fined or even jailed.
Blaming is similar to a victim perspective, IMHO: 'I'm innocent (most important) and injured; the other person is guilty; therefore I can take out my frustration, etc. on them - I can do to them whatever I want.' It often is more about satisfying anger, protection from shame and other consequences, and is a distraction from problem solving. And those blamed, as here on HN, are often the people who are most socially acceptable to blame - whoever is unpopular and vulnerable in the current crowd.
In this case, people driving cars and riding bicycles are in a system that yields problematic results. How can we improve that system? Talking about blame