Because it's a band aid on deeper issues. When a close family member of mine died, the first thing the doctor wanted to put me on meds. No, I needed to grieve. Humans are meant to feel emotions. And new research suggests over prescription is actually adding to the mental health crises. The comparison to purely physical diseases is a false one, a medical professional should no that. Hell, our thought life effects how chemicals in a brain work, but you would know that right? CBT and healty living have been shown to be much more effective and battling things like depression, but that means you and the patient would actually have to put in some effort.