I think cats just like to eat bugs. I mean they're smaller, present a challenge to hunt and capture, and they are technically meat.

In Arkansas, we had lots of crickets, to the point the cats got tired of eating crickets.

One time Vixen and Scooter fought over a grasshopper. (Scooter ate it; Vixen bopped him on the nose over it.)

When I was growing up, our neighbor's dog would catch wasps right out of the air and eat them.
Thanks to Baxter and Sally...I have a bug-free house. They see a bug, it dies :p