I know that one isn't supposed to judge a book by its cover, but I refuse to take Kirsten Weir seriously by the title of this article alone. "Are you depressed? Cheer up!" "Are you in a wheelchair? Get up and walk around!" "Struggling with money? Try not being so poor!" The title of that article makes me unreasonably angry.
Because, really, it's only people who are depressed that don't cheer up, and nobody else is moody/grumpy with no reason and could use the advise, right?
Think of the second example you give: "Are you in a wheelchair? Get up and walk around!"
If the article had "Get up and walk around!" as the title (in the same way this has "cheer up") would you take it as addressed to people in wheelchairs?
What about all the sedetary people that sit in front of a PC or on their couch 24/7 but are PERFECTLY capable of getting up and walking around? The article would be obviously addressing them in that case.
So why read this title as addressing "mentally ill/chemically imbalanced" depressed cases?