Yes, it is fine. Although it looks and can taste carby, it is not. It's a close relative of the tomato but more fibrous. Thus, like tomato and no many vegetables, basically carb-free and nutrition-free, but tasty and fun to eat.
It's a pretty good substitute for carbs, in fact. I like it grilled, sauteed in olive oil, or steamed or sauteed with tomato and summer squash. I can do without eggplant parmesan.
How do our readers like to cook eggplant?