If someone tells me there is an electrical imbalance with the computer, then I will know we need to fix the computer, rather than the software that runs on it.

If someone tells me there is an electrical imbalance with the computer, then I will know we need to fix the computer, rather than the software that runs on it. with your engine oil analogy, it seems like you are agreeing that brain chemistry is an important part of good mental health, just not the only one. So if all the other parts of good mental health are in order, that leaves brain chemistry, hormones, etc. As the problem.