I agree with you, what they class as overweight is far from obese and is not really detrimental to our health.
Although I thought it funny when you used as your example saying to the "Doctor, about having an increased risk of catching pneumonia" Because I actually do.
I'm imprisoned in my house because I suffer from allergy induced pneumonia, when I breathe in certain chemical smells such as second hand tobacco smoke or perfumes and aftershave I have a high risk of catching pneumonia, I instantly get a sore throat that sometimes bleeds then the next day it turns into tonsilitis, followed by bronchitis then by the time 5 or 6 days are through I have pneumonia.
I do brave it out to the shops once in a fortnight but I have to wear a mask over my mouth/nose and everybody stares
I developed my chemical allergy suddenly when I reached 40 years of age.