Don’t touch it! You might break it
is the opposite of
Touch it! You can make it better
I fully appreciate what he means by this (and we mustn’t forget that Seth Godin does not blog on the subject of software development, although a lot of what he says often has relevance) but in the world of software application support I think there is a middle ground in this case.
Improve it only if you are sure you won’t break it.