It has no qualifiers.
It’s not ‘as long as you’re not obese!’
It’s not ‘as long as your bones aren’t showing!’
It’s not ‘as long as you’re healthy!’
It’s not ‘as long as ________.’
You are completely entitled to have standards and limits set for your own body, but that is the only one you own. No one has any right to judge anyone else’s body, lifestyle, or choices.