But it could be suffering is by nature what allows us to enjoy good. You can't have a human if the human doesn't know not good, because how would you enjoy what you can't appreciate? The rat utopia experiment kinda shows what happens when you introduce a biological being evolved for stressors to a perfect environment. And humans may already be going through something similar but not as bad in developed countries (the lower birth rates, increased depression, etc) as what happened to the rats in the rat utopia.
So essentially what you're proposing is not allowing humanity to exist, and that it's a good thing.
It's not an invalid argument, but do consider some might consider that in itself evil, which brings us to the biggest real question: defining "evil".