[DanBC]

CBT isn't as simple as "you can control your thoughts". It's a carefully structured plan of therapy to give a person the skills and techniques they need to control thoughts.

By saying, and repeating "you can control you're thoughts" without giving any of the detail of CBT you're merely telling people with depression to just think themselves happy.

Also, people with OCD will find it harder to control their thoughts, and people with psychosis may find it impossible without medication.