Yep

You can no more "shake it off" (it = depression) than a person with a broken leg can walk it off or someone with dyslexia can just 'read right'

Or a cancer victim can just stop metastasizing (you know, that cancer would stop bothering you if you just accepted Jebus)

It is not a character flaw (I have those too, in abundance, but that is just a coincidence)