I agree we don't know the facts from both sides, so probably over spoke. However, if the fundamentals are true: that he struck her and then fled the scene, he has pretty much lost the high moral ground. He could have stayed to make sure the police got his side of the story.
Of course, if a driver had knocked him down and injured him much more seriously than a perforated eardrum, it wouldn't get a mention on the bbc site. I typed "cyclist injured" into the search box at the top of that page, and it doesn't get many matches in march. To wit: this article, one death, one serious injury and 12 cyclists knocked down in Brazil. Notably missing is the death in South London where the driver has been arrested.
Another "man bites dog" news story.