People can mown their own lawn - yet they pay someone to do it
People can cook their own food - yet they go to restaurants
Your comment is ridiculous and irrelevant. What’s the mixture percentage? What’s the quality of the product? I would bet the mixture you create wouldn’t work or be sufficient for the use of the product. People purchase for ease and quality. And last I checked your mixture wouldn’t have an EPA number on it either. Smh