But why is it bad that it is only useful from a command-line scenario?

It's not that it is bad, its that it could be useful in many other scenarios too, so why restrict it? Processing directories recursively is something i run into quite often actually, and not always on the command line. If he could offer a module interface to it as well, I know I would find it alot more useful. But hey, this is all just my opinion.

Yeah, but there are already about ten thousand modules out there for recursing through directories that we can use within programs. Why would we need another one?