The details you focus on go smoothly, so choose the details carefully

“When doing project management, you can’t ensure everything goes smoothly, only the things you focus on.”

If the above statement is true, then the things that do not go smoothly are the ones you chose not to focus on, and your inattention is why they failed.

Choose carefully, else others will choose for you by being noisy - "whichever stakeholder makes the most noise" is not a viable prioritization strategy for your attention.