The reason I like it so much is it adds stakes, "can she get out of this situation or turn into Wonder Woman before she's killed?" there's inherent drama in the secret identity approach. It also proves she's a wonder woman even without super-powers, that's why this thread is titled the way it is.
She can become so much more by becoming temporarily less. It shows her accomplishments aren't dependent on her station or blessings from the gods, but by her own tenacity and hard work, the way real life women have to progress.
dp 87.jpg