It is important to say right up front that quality isn’t everything, and acknowledging it isn’t some sort of moral failing. Value is what you are trying to produce, and quality is only one aspect of it, intermixed with cost, features, and other factors. There have been plenty of hugely successful and highly regarded titles that were filled with bugs and crashed a lot; pursuing a Space Shuttle style code development process for game development would be idiotic. Still, quality does matter.

John Carmack, in his post on the benefits of Static Analysis.