Picture a continuum of ethics in medical treatment in terms of disability and trait enhancement. At one end we have the concept of preventing and curing fatal conditions like cancer, AIDS, or lethal forms of dwarfism. Most activists would agree that it is noble to end this kind of suffering. Next to that is surgery and other treatments to alleviate pain and increase mobility and health for many illnesses and disabilities, including dwarfism. At the other end of the continuum are the cosmetic treatment more related to traits, plastic surgery, limb lengthening and genetic enhancement.
Traits are about variation.
For example, people with Down Syndrome and dwarfism are different from the general population, mostly in terms of intelligence and height, respectively. We provide variety, as each person does in his or her uniqueness, some genetic in causation, some not. Call it Divine Wisdom. Yes, there are medical and social complications sometimes associated with our differences. But those can be fixed separately with access to good quality health care and environmental adjustments.