I think it depends on the person. The most brilliant dancer in the world could have be trained for more than seven hours a day, everyday, since they were four, with a hand-picked professional private teacher that treats them like a glass vase and they could have loved every single second of it. Another talented dancer with just as much passion could train as much, but with a strict, cruel teacher, under a brutal environment. It just goes to show that everyone is different, and so are experiences