Adversarial divorce accounts for a relatively small portion of the actual divorces granted. Most divorces are uncontested. But adversarial divorce is what the judges see. Adversarial divorce is what the lawyers see. Adversarial divorce is what the politicians see.
Adversarial divorce is what the police and prosecutors see.
Adversarial divorce is what the reporters see. Adversarial divorce is at least disproportionately what the therapists see. As a result, it's what we often hear about. But it's not the typical way most people get divorced. Most people are smart enough, or poor enough, to realize that it's foolish to spend the little bit of money they have fighting about their divorce.