The hadeeth teaches us to have system in our life. Any collective or individual work requires system and planning. We need to prepare for a situation before it arises.
Despite Rasulullah (sallallahu ‘alaihi wasallam) being the leader of the Mutawakkileen (those who have trust in Allah Ta‘ala), he wore a double armour at the occasion of the Battle of Uhud.
However, our trust and reliance should not be on our planning, rather on Allah Ta‘ala alone.