Oh stuff the critics. I don't care. Too many people are snooty about classical. Look I wasn't brought up in a home where we listened to classical music. It was a singing teacher that thought it would be best for my voice. Then I moved into crossover. And if that makes the music accessible to more people then great.
You are never so alone as when you are ill on stage. The most nightmarish feeling in the world is suddenly to feel like throwing up in front of four thousand people.