It's not about blame. It's about recognizing the need for safe infrastructure: physically separated bike paths, not painted gutters. Physics does care about the difference between crossing a painted line vs hitting a bollard.
Dedicated bike lanes almost always share the same risks as the incident in the OP: the intersections are still shared. And sometimes driver behavior is even worse when dedicated bike lanes exist at intersections, because drivers turning right forget they are sharing the intersection with bikes proceeding straight-through from a lane on their right.
