I’m sure plenty of pedestrians have been killed by cyclists.
I did some quick searching and found 2019 data from Europe. In all of the EU that year, bicycles killed 19 pedestrians while cars killed 3200 pedestrians. Over 168 pedestrians killed by a car for each killed by a bicycle. I know there are plenty of irresponsible cyclists, and yet they are still a tiny fraction as dangerous as a driver.
I've noticed that, if an equation calls for a number squared, they usually really mean a number multiplied by its complex conjugate.