You are right, it isn't "called for" to call someone an "idot" when they ask a question.
However, as a person that has struggled with depression for as long as I can remember, I also reacted with anger to your question. As I read it I understood it to be rhetorical rather than seeking information. Perhaps that is not what you meant to communicate.
The anger response,(I can only speak for myself), is linked to desperate desire that I could just "pick myself up" and get going, accompanied by the deeply painful feeling that something is "wrong" with me because I can't.
However, the body and the mind, (for what is the mind but workings of the physical brain), ARE the same. That is why neurotransmitter levels effect a person's outlook on life and situations, and one's ability to "bounce back" from distressing situations in life. That is also why when my blood sugar is low, I become forgetful, tired, impatient, irritable, depressed, and so on.
Neurons and neurotransmitters are physical, and they are what makes up your brain, the physical organ of your "mind."
The separation of "mind and body" is a western concept, and I believe it to be an unhealthy one. We deprive ourselves of good food and sleep, and endure physical pain because we believe that our body is a only a vehicle for our-"selves."
You are very, very fortunate if you have never experienced this type of depresson. I hope you never do.