The sanitation worker's fault is 20%?

A vehicle hit a sanitation worker while reversing… But the sanitation worker's fault is 20%?
https://v.daum.net/v/20261020085313249
Because the offending driver was not under the influence of alcohol, the case was simply closed as a violation of the 'Act on Special Cases Concerning the Settlement of Traffic Accidents,' resulting in nothing more than an administrative penalty of license suspension. Furthermore, the perpetrator has not offered a single sincere apology to the victim in the more than two years since the accident. They even refused to pay nursing expenses under the pretext that the victim did not undergo surgery, and absurdly, the insurance company has claimed 20% negligence on the part of the victim, citing 'failure to maintain forward attention.' Outraged by the unacceptable settlement amount and attitude, the victim has finally taken legal action against both the perpetrator and the insurance company. Broadcast at 9:50 PM on the 20th.