When auto manufacturers fail to comply with safety regulations, they put their customers and others on the road at risk. They can also do some financial harm to their investors.
If you pay your broker a commission on every trade, you're paying them for their knowledge and experience. You trust that they are making moves that will benefit you and your account.
The Securities and Exchange Commission (SEC) leveled sanctions when an investment banker allegedly misled investors, making them think that a startup company was in a far better financial position than it really was. The case ended up before the U.S. Supreme Court, which backed the SEC by upholding those sanctions.