If you read the article, depression is a component, but the real issue is inability to emotionally regulate often due to trauma or mental illness (where the depression comes in). Additionally they approached it from a holistic perspective and included therapy. Mind you this is an initial study so it's good it didn't have too broad of a scope.

Furthermore, this is treating a root cause of the issue, but in the sons (and possibly daughters) of the people being treated. Growing up with an abusive parent makes you much more likely to become abusive as an adult, and having that parent get help and stop abusing is probably going to spare some future men from preventable mental illness.

Sure there are other social issues that can lead to worse mental health, but the results of this study are hugely inspiring and can help now.