The painted picture is freedom of suicide. It's a validation of someone's inequalities in life. When these inequalities are determinental to us, we're given arbitrary comments that follow suit with "this is life". Life comes with injustices and suffering. While you are right, it is only up to the person, my comment was more-or-less validating a legal form of euthanasia that clinics validate.
Pain is merely subjective. My pain is going to be different from how you interpret pain. By denying "simply because something is chronic makes it a valid reason", it could be misconstrued as you're denying someone the freedom to erase themselves from the genes they've inherited.