I think it's overblown. It made me pay more attention to butterflies in the real world and what I see is when landed they often flap their wings intermittently. So I just think of the drawings with wings open as catching one of those moments.
I agree with your sentiment, the human body is sometimes considered most beautiful with the limbs extended in dance, that does not mean it is always posed that way. I lay in the "corpse pose" every day, it does not mean I am dead.