Why are there so few blown small blocks?

Most and I said most blower cars are more show than go. People think they are cool on the street and can beat anything around but they rarely hit the track because the owner is actually embarrassed and knows he is going to get his butt kicked. Especially with a small block. We had a speed shop owner years ago pour his heart into his big block furd with a blower and it made a lot of noise and ran high 8’s in a lightweight mustang. But then again they got the “WOW” factor going for them.