There’s 200+ different viruses that cause the common cold. When you get a sore throat or runny nose you don’t consider those to be the disease, you know there is an underlying cause.
Do you think Depression is similar to that? Do you think it is a symptom of some other disease or diseases?
The topic is flirting with the “just asking questions” crowd. Soliciting opinion on a scientific question is essentially asking for bullshit anecdotes.