You or I can open a restaurant, but if we don't understand health codes and food safety, we're going to get shut down by a governmental body before we serve our first customer. Assuming we can pass a food safety evaluation and can open our doors for business, the worst that's likely to happen is that people won't like our food and won't want to come back. No one's lost anything there except for the cost of a meal and an hour or so of their time.

I'm sure I could pass an ethics test, no problem. But my first client as a self-described "lawyer" would almost certainly lose their case, and that could cause them significant harm. I'm sure there are ways forward from there, but I don't think I'd characterize this as no big deal, simply because I'd then get bad LawYelp reviews and no one would want to engage my services anymore.