I think the main objection is that what you are saying is technically true - all human conditions are physical in the sense that humans are immensely complex dy

I think the main objection is that what you are saying is technically true - all human conditions are physical in the sense that humans are immensely complex dynamical systems consisting of atoms, molecules, proteins, pathways etc. However it's not helpful in terms of diagnosis and treatment, which is fundamentally different in many ways compared to physical conditions - and stigma is often a result of people no understanding the difference. To make a really simplified example: If you break your leg, a doctor will do a test, an x-ray say, recognise the leg is broken and interfere directly in one way or another with the physical system that is your body. The conscious you is not a part of this process (this is a simplified example, it does make some difference). If you 'break your mind,' again very simplified, because you are treated like sh*t at work, your parent dies, you are genetically predisposed and have no social net, and as a result develop depression, there is no (physical) test. The conscious you is a central part of the treatment. It is even thinkable to not treat the physical you but target your environment instead. Again this is a simplified example with shortcomings. Also having read your replies I believe you wanted to simply highlight that the distinction physical/mental is arbitrary and it is.