Besides aesthetics, deflecting off causes you to become an uncontrolled missile. It seems it would be safer to hit the object and stop than to bounce off it into something/someone else.

As for crumple zones, a pointy car would have a triangular frame, which would inherently make it more rigid and less likely to crumple. Triangles are the strongest shape to build with due to its ability to distribute forces and resist deformation.

It’s also quite stabby. No matter how weak you build the front end of the pointy car, if it hits anything on the front end it has a very small surface area imparting huge forces on the other vehicle. Conversely, the car or object being hit will have very little area to absorb all that force. It would be like stabbing milk jug with a sharpened pencil and an unsharpened one. Sure the graphite tip of the sharpened pencil is considerably weaker than the flat wooden tip of the unsharpened one, but since it’s applying the same amount of force to a much smaller area it will punch through the much easier.

Lastly, you create ground clearance issues. With that much overhang in front of the wheels, anytime you come to an incline you are going to risk scraping the front end. Yeah there are ways around that such as raising the vehicle, but you get into other issues with aesthetics, handling or safety.