This is an oversimplistic view of tech work, especially software. If you're a contractor who doesn't care about the product beyond doing your well-delineated part properly, then sure, that attitude is perfectly reasonable (no sarcasm - that's not intended as a put-down of contract work). If you are an actual part of a team working to create a product you ostensibly all care about, you obviously will work together to distribute work; to account for surprises; to fix problems without being assigned a ticket that tells you exactly how to fix it; to make a good product. It's a fluid bag of work that naturally fills into any holes that develop in people's schedules. Work of that nature isn't "doing more than you're asked", because that kind of teamwork is in fact exactly what is asked.