The deer must be softer than people. When I lived in Las Vegas I seen two people vs trucks within a weeks time. First was on Pecos east of Lamb two people were hit by a 70 model Ford f-250. The hood was bent about half way to the windsheild. The motor was sitting crooked like it busted a mount or two. Second was when I was riding in my friends Wrangler on the strip by the Luxor. A guy in a Nissian 4x4 PU flew past us and I saw this guy fly though the air landed about 200 ft from the impact. The truck was crushed. Look like it hit a telephone pole. Both front wheels were turned into each other.
The first was a middle age couple and they died together. The second just came from his daughter's wedding and was tring to cross the street to buy her a gift. His daughter watched him die. He had a slight pulse when I got to him, but it got weaker and weaker and then nothing. I was an EMT at the time and there was nothing to be done.