> I don't get you. What does a developer has to do with deciding what the business needs? If your job is that, ie, figuring out what a business needs, then by all means work closely with people..But I am not sure that is the type of work being discussed in this context.

Well, if you're a rank and file engineer, your "job" isn't explicitly to figure out what the business needs. However, if you care about becoming more valuable over time, you owe it to yourself to understand why the business values you. The business doesn't care about the code itself, it only cares about the solutions the code creates. If it's slow, that's a problem. If it's buggy, that's a problem. My instincts tell me to accept nothing less than purity, but a business needs pragmatism and "good enough".