Non-cycling crashes that deserve attention

A fairly odd case in which luckily little harm was done and only a parked car was hit; could have been a lot worse. I don't think the article does a very good job of explaining the reasoning in relation to the medical condition. I certainly don't understand it:

Dawson was spared jail at Westminster magistrates court on Friday after Deputy Chief Magistrate Tan Ikram accepted he has Wernicke’s syndrome – a neurological condition which means he does not know he has drunk alcohol.

https://www.standard.co.uk/news/crime/barrister-judge-spared-jail-drink-drive-westminster-magistrates-court-b972646.html