Yes, it is important. However, some project managers obsess over it. Instead of focusing on delivering something the client wants and finds valuable they obsess

Yes, it is important. However, some project managers obsess over it. Instead of focusing on delivering something the client wants and finds valuable they obsess over estimates, minimizing change orders, and time spent, to the point where it becomes the single determining factor in what we do and don't do. It's important to be on time. I've found that it's more important to solve the client's problem. And if you solve the client's problem well enough, the client will give you flexibility on the time.