Because if you want to solve a problem you first have to identify it. That's step 1, before anything else. There's no virtue in being ignorant, especially not purposefully so.

Identifying a problem and blame are different things. The first facilitates problem solving, the second interferes with it. Look up blame-free post-mortems of problems in the IT world, for example.

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