If the Moon is tidally locked to the Earth wouldn’t that mean that the Moon is more likely to be bombarded on the side facing away from us? Isn’t the Earth in the way of many asteroids and comets that would otherwise hit it on the side facing us?
I’d expect asteroids to either impact Earth or be gravity-whipped into space or impacting the moon. (There are many impacts visible on the near side—some of the earliest having been subsumed by molten rock).