庸医可冶百病
[yōng yī kĕ yĕ băi bìng]
This username suggests that even an incompetent doctor (metaphorically meaning someone unqualified or not professional) can heal all diseases. It may be used by someone who considers themselves as good at solving various life problems in an unconventional way, or as self-deprecating humor indicating that the solutions provided might not be orthodox but are still capable.