That's not wrong, but it is a rush card. It's useless if the opponent draws a shield, but in an antlion/graboid/golem rush it doesn't matter. You should be fast enough, and the risk is spread. And..better a dead antlion than a dead shrieker.
In other words, in the opening hand the small hitters give you initiative and early damage. This is annoying, because it's harder to come back from for the opponent.
I do agree burrowing is useless. Even a plain creature at 4-2 is still ok though.