Healthy BMI range is already so generous, it's meant to account for variations in "bone structure" (ok, some people are wider and bigger) and muscle mass. There's tons of room for abuse and self-delusion built in as is. Most people look downright fat at 25 BMI, it's supposed to allow for more muscular builds. If you think the top end of your BMI range is "starving", I don't think you've seen too many healthy bodies recently.