Maybe in your school, but definitely not in mine. And that's so untrue. I play many, many sports, and ballet is definitely the hardest. It's so much more technical than say, basketball, where you just lob a ball in the air.
Everything has to be absolutely perfect, and you have to be incredibly athletic. I also hip hop dance and next year I'll do that at one of the most famous dance centers in the world. Dancing is not lame, it's awesome, and in my opinion, way cooler than some boring sport.