re: How come Major tornadoes never really hit big Cities???

It's already been said, but the ratio of land taken up by small towns vs. bigger cities is the primary reason.

I have always wondered why some small towns/areas seem to be tornado magnets while others very rarely if ever see any. For instance, Vilonia AR has had 3 in the last decade or so, while another small town nearby called Maumelle has had zero since history has been kept on the town. They also seem to form a lot on the I30 corridor between Benton and Bryant, AR.

I'm sure there's some sort of scientific reasoning, but it's not like the terrain is any different in any of these places to have an obvious answer like that.