That analogy is metal vs flesh. Fire a piece of flesh at a human and would it travel through? An asteroid made up of rock hitting the earth which is rock and metal plus A liquid core that could cushion the blow.
That asteroid was the size of australia. How big was it before it broke down travelling through the atmosphere. What cartoon was it when there was a huge asteroid that was going to crush earth and by the time it made it through the atmosphere is was a little pebble that bounced off the end of the telescope.
There's no proof an asteroid killed off the dinosaurs. There is proof of a world wide flood.