I think anger is a sign the developer actually cares about what they are doing. In my experience, people who don't care aren't at all irritated by the imperfections of the software they have to use, they just accept it, slay their dragon and move on. People who care tend to get very angry about what's ultimately philosophical matters.
That bares the question whether it’s healthy to care so much about code it makes you angry. Being able to slay dragons instead of arguing what the perfect angle to cut off their wings is might be a benefit after all.
The question of whether it's more profitable not to care is easier to answer: it definitely is.
Software reflects our understanding of the problems and concepts at hand. Good software implies developers who understand what they are doing and why they're doing it. The reality though is that good software is almost always not actually necessary. Corporations are perfectly happy pushing out minimum viable products as fast as possible.
