Professional advocates aren't a result of any specific legal system - if I'm at risk of having my life's savings and achievements summarily destroyed then I want someone of waaaaay above average verbal and emotional intelligence, who is thinking clearly and not under any pressure themselves, explaining why that shouldn't happen.
There is a problem where the laws so complex and numerous it is no longer practical to understand them or follow them all. People have a bias and don't seem very good at separating "good idea in the current context" from "thing that should be legally required". Let alone navigating the complexity of the phrase "cost benefit analysis". Anyone who lives life while obeying all laws to the letter is at a serious disadvantage to the average human - although since it is impossible to know what all the laws are it is unlikely anyone could do this.
But that arcanery isn't what drives the need for lawyers. You'd have to be crazy to engage with something as powerful and erratic as a legal system on your own. And crazy people do frequently represent themselves already.
There is a problem where the laws so complex and numerous it is no longer practical to understand them or follow them all. People have a bias and don't seem very good at separating "good idea in the current context" from "thing that should be legally required". Let alone navigating the complexity of the phrase "cost benefit analysis". Anyone who lives life while obeying all laws to the letter is at a serious disadvantage to the average human - although since it is impossible to know what all the laws are it is unlikely anyone could do this.
But that arcanery isn't what drives the need for lawyers. You'd have to be crazy to engage with something as powerful and erratic as a legal system on your own. And crazy people do frequently represent themselves already.