>If the issue were biological lack of electricity, why would childhood trauma be linked to it? And why would it be curable through therapy?
Regardless if the serotonine theory of depression is real or not, something having a biological substrate doesn't mean its hardwired or only kickstarted by biological factors.
Levels of hormones, neurotransmitters, and other substances can drop due to many factors, including diet, exercize, sun exposure, vitamin uptake, issues with insulin, thyroid, and so on, but also "psychological" things like trauma response, stress, continued fight or flight mode, etc.
Regardless if the serotonine theory of depression is real or not, something having a biological substrate doesn't mean its hardwired or only kickstarted by biological factors.
Levels of hormones, neurotransmitters, and other substances can drop due to many factors, including diet, exercize, sun exposure, vitamin uptake, issues with insulin, thyroid, and so on, but also "psychological" things like trauma response, stress, continued fight or flight mode, etc.