Two types of actions.
There are certain things that give results in a single action. You eat a pizza and you feel the taste and the sensation. Rather multiple repetitions might take away the pleasure.
On the other hand, there are things that either give pain or don’t do much in a single act. Workout, meditation, eating a healthy meal, reading, to name a few.
It is only after a significant number of repetitions do the results actually start showing somewhat. And this becomes better as we do more reps.
If we do the former repeatedly, or if we do the latter intermittently, we don’t get any benefit.