I reject the premise. Emotions are based on chemicals in the brain. That doesn’t make them inauthentic. You’ll have to get used to the idea that we are not as free willed as you might think. Our very thoughts are determined by chemicals. Change the chemistry, and you can no longer think what you thought before.
Perhaps you are privileging the “natural” state over the human managed state. Not quite sure how that argument goes. We seek to manipulate our own states and our own thoughts and the thoughts of others all the time. How is pharmaceutical intervention in the chemistry of our thinking and different from using brain techniques to intervene?
Nope. If you are depressed, and suicidal, then it can be an extreme relief to find a drug or combination of drugs that keep you from killing yourself and that allow you to even consider the possibility that happiness could be achieved. If you are manic, and about to sell your 100,000 house for five thousand dollars, you may well be happy that Lithium can even that out.
Is your desire to destroy your most important belonging authentic, whereas your happiness is not? Is your desire to jump off the Golden Gate Bridge authentic while your alleviated depression is not?
I think this question shows no appreciation of authenticity whatsoever. This is a complicated topic and denying that complexity does us no service at all. Here. Have a demerol.