I agree with you for that confession, except for one thing. "that never chose to be famous". William didn't. He was born into this. But Kate made the choice. She accepted to marry William, therefore she accepted to be famous. Whether or not that she wanted it, that's a different thing. But she still said yes to being royalty, therefore the fame comes with it. Am I clear enough ? :/
I understand what you’re saying, but I’d like to believe Kate fell in love with William regardless of his royal status, and thus chose to be with him, and only took the royal thing on because it came with him. If that makes sense.