I think he's suggesting that *some* people like the *option* of fixing the software they use themselves. It's always nicer to get a fix for something from "upstream" somewhere, but that's not always possible. It's nice (a GPL-cheerleader might say "essential") to be able to fall back on your own elbow grease.
The relative quality of the code in question doesn't enter in to it. After all, what good is beautifully written and documented code if you'll never see it?