It's a balance. I think most people care
too much about their employer's goals. The heresy is that you can't just say "Well, I don't care about my employer's goals," or else you'll be facing some negative reviews.
The trick is to make it a mental shift. Here's a concrete example: Suppose you were coordinating with some large bank that takes a very long time to do anything. Should you feel bad that most of your day is spent waiting for them? Should you proactively go out of your way to find extra work for yourself?
I don't think so. You waiting for Big Bank is the business goal. But most people will tell their manager "I have nothing to do; please find me more work" (in so many words).
There's no reason to stress yourself out like that. Some would say you'd be doing the bare minimum. I would say that you'd be fulfilling your business obligations, and that you'd be acting professionally.
Most people won't have such direct opportunities to minimize their workload. But they often maximize their own workload for no reason, until their managers practically force them to take time off. (Or they don't, which is worse.)