The trouble with lawyers is that their quality varies tremendously but the client has very little ability to tell the difference until after it's too late.
In theory this is why they have to be licensed but in practice that consistently leads to the profession capturing the licensing board and using it for protecting the providers rather than the customers.
Whoever can create an objective way to determine the quality of legal representation is onto a real winner.
I find it near impossible, even as someone with a lot of legal knowledge, to tell whether a lawyer I hire is going to advocate zealously and correctly and comprehensively on my part once I hand over my retainer. They all talk a great game.