Every sauced pasta dish recipe I ever read calls for using the water in which the pasta was cooked for the purpose of thickening the sauce, as the water contains a lot of starch which helps the pasta adhere to the sauce
In this recipe, this step is skipped and the pasta is added without any water/starch
What was the reason for not using the pasta water? Or in other words, when should you not want to add pasta water? (other than in cold pasta dishes like salads)