I think it's contempt for people who won't stand by their work. Maintenance engineer implies a very long term relationship with code but you can't get some self-aggrandizing butterflies to support something they wrote a month ago. The truth should be somewhere in between.

When you're young it's easy to derail your complaints by implying you are not smart enough to appreciate the magnificence of the code. I tend to take Feynman's position that if you're really so great, your solutions will be obvious.