It's more like telling a person with symptoms of depression or PTSD that they should see a therapist to get to the bottom of things rather than just popping pills. In fact, PTSD suffers really should be in therapy instead of on a drug regimen. Many people are wrongly diagnosed with a depressive illness when they have psychological problems better addressed by therapy, so it's actually good advice and can avoid a lifetime of drug dependance that doesn't solve the actual problem.