Whereas to me, happiness and contentment are Good (capital G intended) and suffering is Bad. Any conscious action taken by a moral actor to increase suffering or reduce happiness is Evil, and so too is any action to increase happiness or reduce suffering a Good one. An action taken which results in one or the other without the intent to do so is consequentially good or evil, but not necessarily morally good or evil. Basic utilitarianism here, guys.
If I were to jump to extreme conclusions the way you did, I could imagine your outlook leading towards compulsory medication to ensure the maximization of chemicals that are biologically associated with happiness. And I would bitterly fight such a motion.
Because happiness is not the same as fulfillment, and fulfillment is more important. Happiness can be hollow.
I love sitting around at home playing video games. When I'm doing so, I am at least content, if not happy, the entire time, and not suffering.
I'm also about to go on my first serious vacation from work in over a year. I'm not going to spend it sitting around playing video games. I'm going to go kayaking/camping on a river for several days, where I will completely separate myself from the technology that I love, get sunburned, eaten up by bugs, physically exert myself, probably be really hungry at times but forced to ration food, etc. I will not be maximizing the amount of happiness that I experience on my vacation by doing this.
But it will be many times more memorable than a vacation spent sitting around being blandly happy.
As much as I love sitting around playing video games as the most assured way for me to experience some happiness and minimize any suffering, those experiences are often the least memorable, adding the least enrichment to my life. If that's all I did this week, I would be happy the whole time and go back to work much better rested. But I would have added nothing to my life worth talking about. When I reflect on my life, I would probably barely remember that the week ever happened. Despite maximizing my moment-to-moment experience of happiness, it would contribute nothing to my personal story - that sense of fulfillment that comes from having a life full of moments worth reflecting on that are varied and interesting for your subconcious to digest and process into a great self-image, that build up the sophistication of your perspectives on yourself and the world, that increase the variety of experiences that enable you to connect with other human beings in meaningful ways.
And while I absolutely do not want to glorify suffering, it's hardships and challenges that contribute the most to the sense of enrichment that builds up over the course of a lifetime, and there is unpleasantness involved. If I just sat around playing video games forever, my life would be as if nothing ever happened. A void. And I would have no sense of identity, of accomplishment, of being capable or interesting in any way, of connection with and appreciation for the expansive nature of reality. Even if I was happy the whole time.