Have you ever tried exercising when depressed? I'm overweight and depressed. I know exercise could make me feel better.
But how the fuck can I do it? I can barely muster the motivation to shower more than once a fortnight.
It's not ignorance. I used to be a runner and know the Ashtanga yoga first series by heart. Also did judo.
But actually doing anything is way fucking beyond my reach.
So no. It's not a panacea.
It's just another "smile and you'll feel happy" comment.