It's a good way to "gamify" decision pressure such that insecurities and the typical anxiety involved with "I have to admit I'm doing this wrong" don't rear their ugly heads. Instead, you dissolve the sense of self just a bit, with a "I'm a bunch of modules"-approach that makes it oh-so-easier to acknowledge and fix mistakes, since there's less of the monolithic "I did wrong, I am bad"-response triggered.

Nice trick, in short.