Of course actual improvement is the goal, but when compared to no treatment a placebo treatment is better, and that is what we see with people who are suspicious about real treatments, or with people whose condition makes the available real treatments impossible.So yeah, I guess you could say that people thinking they feel better is a better outcome than people not thinking they feel better, but surely actual improvement is what we're interested in?
There are also conditions where conventional medicine has no treatment, such as some forms of arthritis. The patients are told to live with it, or take pain killers. A placebo treatment, no matter if it is a pill with glucosamine, homoeopathy, or a belief in healing magnets, is better if it enables the patient to live with the condition.
A child may have had an accident that hurts, and if it helps managing the pain that a parent blows on the painful spot, then why not do it, although it is a placebo?