It’s actually to give you a break - so you can better judge effects; and give your own system a break so you don’t get used to the mones and a bunch of other stuff which is explained in the sweet spot testing link:
How To Find Your Sweet Spot (How to find your sweet spot...)
If you haven’t read it yet - do. It will prevent you from wasting time and mones with redundant experiments. It’s also the reason most advice for newbies is to buy regular strength first. So if a sweet spot is 3 sprays, you don’t have to try and figure out half a spray. Remembering that with mones; more often than not, less is better. Most peeps start with one spray of regular strength = for a couple of days with observation; then two of regular strength for a couple of days with observation - get it? A consistent scientific approach. One time doesn’t equal data - it gives the result for that one time. I think you need a more systematic approach.