Okay, clearly I made the same mistake as the headline in the news article.
His defence is not that he sneezed and sneezed and sneezed and couldn't keep his eyes open. But rather that he sneezed, then can't remember anything afterwards, so the sneeze caused him to black out.
Though I would say that if someone suffered so badly from hayfever that, say, they couldn't go 5 minutes without a sneezing fit that caused them to not be in total control of their car, then yes, they shouldn't drive. If the hayfever is controllable, a sneezing fit happens every so often, but can be lessened by using antihistamines and the like, then that's something totally different again.
So many shades of grey.