Focussing can cause anxiety. You address one concern and ignore another. The more concerns you have, the harder it is to address them all skilfully.

This approach is like juggling.
Instead of going with the flow and feeling what is happening, you are trying desperately to catch one ball whilst keeping all the others still up in the air.

What is the answer?

There is no fixed answer.
Sometimes it is beneficial to look at the individual details and address them in depth.
At other times, you must consider the overall event and feel the essence of what is happening, the flow.