Right, and the associated cultural impact of increasing hedonism
This whole thing is about trying to find shortcuts to get to the pleasure of having a nice body while circumventing the pain and effort.
Pain and efforts are important, they forge character like nothing else. If you want to live in a world where adult-children simply take their soma to get what they want, you're just not thinking about the consequences.
Why is this particular thing the bad thing?
Also, about headaches and more generally physical pain that you know is only temporary and not a sign of radical bodily malfunction, I say yes: enduring a reasonable amount is important to develop a tolerance to it and willpower.
What I'm saying isn't new anyway, everybody knows some amount of struggle is needed to temper character and not fall to the most insidious poison of our times: constant comfort.