I think the phrase "only you can help yourself" could be interpreted in a more positive light. Sure, some people require medications, the help of a psychiatrist and/or therapist, and even hospitalization. There is nothing wrong with receiving assistance from others when you need it. But it does have to be the individual (most of the time, there are exceptions when the individual is so ill that help needs to be forced upon them at first) who decides to seek out assistance, and in that sense it is only they who can help themselves.

There is a big difference between using the sources available to us such as medication, doctors, exercise, meditation, etc, and then just hoping that someone or something will come along to save us. Unfortunately in this world, that just doesn't happen. We are responsible for putting in the leg work, so to speak.