“If they do reach the ground they don’t do all that much damage (compared to what they can do). Sure, it will cost a lot to repair all the windows, but it’s extremely unlikely to actually get hit by one (as far as I know, only two recorded cases of that in all our history).
“The asteroid that wiped out the dinosaurs had a size of about 10 miles and such impacts only happen every several million years (since this particular one was the last, it has been 65 million years now).
“But no matter how small the chance of it happening in our lifetime, it is pretty much destined that another big one will eventually hit Earth again, some time in the future.”
However, NASA has said that a much smaller asteroid still has the ability to cause chaos on the planet.