I know many, many people that don't know the basics of how to cook and prepare food. Now, in truth, a little googling and you-tubing can teach you a lot, but some people don't like to learn that way. If you can learn to peel potatoes and chop veggies and such quickly and easily, you might be more likely to prepare your own food, which can save you money in the long run.
But yeah, that link makes it sound like an MLM with a side-task of peeling some potatoes.
PS I almost NEVER peel potatoes. potato salad and mashed potatoes always have the skin on them for me. :)