PMO as our "medicine" for hidden depression?

I've come across Dr. Stephen Ilardi, a professor of clinical psychology, who is basically saying that we're genetically still build to be hunters-gatherers, not build for modern society. That's why rates of mental illness especially depression and anxiety are skyrocketing, getting worse with every generation. Different forms of addictions are just us trying to cope with this dissonance.

Dr. Stephen Ilardi:"We were never designed for the sedentary, indoor, socially isolated, fast-food-laden, sleep-deprived, frenzied pace of modern life."

His solution to the problem is basically change of our lifestyle, cure depression and anxiety that will lead to curing addiction:

1. Physical Activity (Exercise)
2. Omega-3 Fatty Acids
3. Sunlight
4. Healthy Sleep
5. Anti-Ruminative Activity
6. Social Connection

What do you think. Does he have a point?

Here's his TEDx Talk about depression:

 

If you've got first four covered, you're better then most of us

This advices really make sense to me. I've tried rebooting so many times, without changing my lifestyle drastically and after achieving 30, 90, 180 day goals, I was always back to day 1. I'm gonna try following this program. Yeah, finding real life friends and not worrying as much is easier said than done in this crazy age of social media, but what can I loose? Everything else has failed. Being trapped in this shitty addiction/depression/anxiety circle for almost two decades now, I would literally rather end in all, than go living like this for the next 20 years.