If you are cooking a fancy potato puree and you need the texture to be just right, then peeling the potatoes might make sense. But if you are just making a regular meal using potatoes as one of the ingredients (a soup, baked potato, hash-browns, or really any other potato-containing meal), peeling the potato is just not necessary, and it removes a valuable nutrients. If you are worried about dirt or additives getting on top of the skin, just wash it. Any pesticides or fertilizers that got into the skin likely also penetrated deeper into the potato, so if this is something that really bothers you then you should find a better source of appropriate-quality potatoes.
A place to post an opinion you accept may be flawed, in an effort to understand other perspectives on the issue. Enter with a mindset for conversation, not debate.