You are wrong. Crashes are rarely random, and almost always have a non-random cause. When was the last time the FAA, upon examining a plane crash, just threw up its hands and said, "oh, it was just a random crash! Sorry guys!"

No. Airplane crashes are due to pilot error, maintenance error, or another preventable cause.

Same with bicycle crashes. The overwhelming majority of them have a cause, and the most common cause is one form or another of rider error.