There was a hangar neighbor of mine in Santa Monica who was one of those pilots described above. He had many hard landings at KSMO and KVNY and even left the runway on one of them on rollout after landing. After numerous CFI's (mine included) refused to fly with him again or sign him off he found someone who cleared him on his review and he subsequently landed hard (again) and killed himself. Many people tried to talk with him about him needing to consider stopping his aviation activities but he refused. Although in the video (see link) he says he was unfamiliar with the area he had in fact flown into KVNY on many occasions and was quite familiar with the approach. It really was avoidable and very sad that he would not listen to the advice given that perhaps he should stop flying.
Text Below From YouTube.
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The pilot was involved in a car accident that resulted in serious injuries and required intensive care treatment for about 5 months. Another witness reported that the pilot took several months to recuperate but was not the same person physically after the car accident. The witness stated that when the pilot returned to flying, he was unable to hold his head straight. He was frequently hunched over and was only capable of using about 10% of his right arm and hand strength. When driving, the pilot frequently used his left hand to pick up his right arm and place it on the gear shift. The witness reported that the pilot's physical condition was the same the day before the accident. The witness further stated that several instructors refused to fly with him; eventually, the pilot found one instructor who agreed to sign him off for a flight review. The witness stated that several of the pilot's peers had encouraged him to stop flying