Everyone makes mistakes. A seller (or buyer) who doesn’t have the representation of a licensed agent pays for those mistakes. Attorneys can close a real estate transaction, but they don’t carry errors and omissions (E&O) insurance.
https://www.google.com/amp/s/www.inman.com/2018/07/02/11-resasons-for-sale-by-owner-is-a-terrible-idea/amp/