Yes, some are in need of medications to control urges and help with some symptoms. All mental illnesses can't be lumped together as some are violent oriented, while those with depression are only a danger to themselves. No amount of diet, exercise or talking is a quick fix for those suffering. If a person develops depression while living a healthy lifestyle there are other things that need addressing, and medicine can help them, at least until the whole picture is seen. Medical issues, underlying trauma, high stress, environment, seasonal triggers, and genetics all come into play, which is why helping a person who has depression must mean all bases are touched, and it can take a lot of time if it's genetic to turn around, if it can be.