Only goes to show the importance of a proper look out and good airmanship
On the contrary it could equally well indicate the utter futility of "proper lookout".
The history of human factors in most areas of aviation progresses along a similar path. It starts with the pilot getting blamed for not being
good enough. Gradually, as science and medicine advances, and particularly as those well known to the guys who make the rules turn out not to be
good enough either, we realise that the human animal is not capable of reliably performing the task that some of us have been proven not
good enough to do. So then we take a rather more practical approach, and start to make some real progress by teaching pilots about their limitations and associated risks, as well as using technology to supplement the frail human.
For some reason, probably related to the fact that all the money is in commerical aviation conducted under IFR in controlled airspace, we're a long way behind in this process with regard to
see and avoid in GA.