I have difficulty imagining an agile process worth following where standups don't reveal that people aren't doing worthwhile things, where retrospectives don't reveal that estimates have gone horribly wrong, and where pair programming doesn't reveal that some people shouldn't be writing software.
What exactly do these high-ceremony agile projects practice?
I do think that poor developers can be taught to be better in a work environment, but it's a painful, slow process, and has to be started with an a keen devotion to the process on the part of the trainee, which if it were going to happen at all, would probably have already happened during college.