The kid can be taken out in public to painful stimuli that shouldn't be painful as part of desensitization therapy, over time feel things fairly normally, go on to college and get a good job and pay for the haters' Social Security checks when everyone is older.
Or the kid can be kept out of the public eye so others don't have their ears assaulted, stay low functioning, and the haters around can pay the taxes for the child's long term care.
Put that way, guess what the haters choose.