Getting rejected stings. Not only are you out the chance to have a published clip and make some money, it hurts that you put so much work into a piece only to have it summarily dismissed. Hearing “thanks but no thanks” is like being told your baby is ugly.
It’s even worse when you’re searching for a literary agent. Sending a brilliantly concise letter and a sample chapter and getting “not a good fit” in return is like being told your baby’s ultrasound is ugly.