Just because the Torah allows something doesnt mean we have a Taavah for it.
The Torah allows the eating of certain kinds of Locusts. Assuming you hold by those who say they know which locusts they are, I dont think you are running out to eat one, Most people are repulsed by the though of eating a locuts and most people are repulsed by their cousin, most people consider it incest which they are repulsed from.