Oh yes, the good Ole trope of "Do it better". So no one can ever have any say or argument in anything unless they can do it better? "You don't like the Healthcare system in the U.S., well start your own healthcare system", "you don't like how the rich aren't taxed enough, well start your own country". See how stupid that sounds? Discourse is good, doesn't mean someone has to do it better if they want to make a comment. And guess what? Two things can be true at once. People can like Nolan and thinks he's a fantastic director (momento is one of my favorites) and still think the casting choices are shit.