The goal is to not overwhelm the medical system. We are achieving that goal currently by not overwhelming the medical system. The strategy is working right now, no reason to balk from it if it's getting desired results as this pandemic runs its course.
I'm a little confused about your semantics, so I fell down the hole. A strategy is the plan of action itself to achieve a goal, and the tactic is the action or strategy to achieve the goal. Slowing the spread seems to fit both definitions depending on how you word your sentences.
