Talking is fine of course, it is an interesting subject indeed, you seem to take it a bit further than that however.
Personally I don't really care about what people weigh, as long as they are comfortable with their body. Ones body really isn't anyone elses business.
I would like it however if everyone lived a healthy life style and ate alkaline nutritionous foods, but the amount of fat one has is not directionally proportionate with how healthy they are.
Some new age researchers claim fat accumulates because it's a defense mechanism to protect organs from acidity, have you read anything about such notions?