Yeah, but even a cup of celery contains a gram of sugar. Eating "no" sugar is preposterous. You could never eat any fruits or vegetables! But lots of people avoid excess sugar, me included.
> Eating "no" sugar is preposterous.
This is relatively easy for anyone on a carnivore diet.
It's actually not hard to eat a diet that doesn't have a lot of fructose. More difficult to avoid heavily processed carbohydrates that are absorbed too quickly.