Yes, for example a teenager with religious parents might not want them to know that they're buying contraceptives, or a buyer of illegal drugs might not want the government to know it. As long as there are anonymous payment methods such as cash, money laundering remains a possibility. Besides, getting ETH from Tornado Cash is not comparable to money laundering because whoever will be paid with those funds will have a strong suspicion that they were stolen or came from some other type of illicit activity.