I would think that as very rude of a person. They could have been the cause of death, and they didn't even apologize. The person could also be afraid, though, of the consequences if you were to press charges. Maybe they hadn't realized, though? If that were the case, I would not think of them as rude, but as dangerous, because they were not paying attention.
It is a popular quotation that means “it is better to live as lions do. They are not only a risk taker specie but also brave, courageous, fearless and strong. By contrast, lambs are meek and they always follow the herd.
