But a couple of weeks in a tank, the vast majority of which I spent unconscious anyway. Getting used to a humanoid form is easier than it seems as long as you remember that you don't have more than 4 limbs anymore.

A bipedal form is a much more agile and skilled weapon wielder than an insectoid one. Could you imagine swinging a sword when all your limbs are close to the ground? It's not an easy feat, I assure you!

Besides, the pro-earthling party figured that contact with Earth will be easier if their ambassador looks similar to you.