Whatever you do it's always connected to something else. You can't do anything in a vacuum.
Every system is made out of small pieces. And it's hard to focus on all those other pieces and dive deep into the one at the same time.
When getting your hands dirty it's best to focus on only that. Forget everything else around and just do whatever is at hand.
But on larger scale it's better to account all that is connected. To reflect how it affects everything around whatever you are doing.