Why do people that don't live a healthy life complain about being/looking fat, chubby or being deemed less attractive?

I mean, it's there own choice isn't it? There is this growing trend where it is frowned upon to expect men or women to look like models thus resulting in shaming of those who do have such expectations.
Why do people that don't live a healthy life complain about being/looking fat, chubby or being deemed less attractive?
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