Lawyers don't have to ambulance chase to be destructive - all they have to do is practice law, spend more time and concern about the mechanics of winning a case, and less or no time worrying about what is best for the clients in total.
Under advocate law, the lawyer takes a side. As a result, the lawyer is concerned only about the advantage the lawyer's client walks away with. There is no room in this ethic to be concerned about the overall well-being of what used to be a family. And that's why there are too many lawyers.
Mediation is better than the adversarial system that you noted. Have you heard much about mediation?