We know food can affect mood, depression/other illnesses can affect the brain as can living life! I think the number of people diagnosed with depression (MDD) for whom neural science can be most helpful is extremely small. We need to combat bad parenting and poor living conditions more than telling the brain how to do its job.

I'm not saying nurture is more important or beats nature but we cannot fix nature, other than setting broken bones and sometimes removing "masses" that probably shouldn't be there, medicine is only a "helper" and often a very poor one so the body can repair itself. I'm for better understanding the brain but I don't think we'll be in a position to make it "better" anytime soon. We create the social structures and probably can help more by making them work better.