I'm not sure if you're intentionally missing the point, but the body does not need a dietary source of glucose to survive. Yes the brain needs glucose, but I'll say it again since it looks like you missed it.

Your body can and will make the glucose it needs from non-carbohydrate precursors.

I pointed out that we don't need sugar in our diet to survive. Can you explain what was incorrect about what I said?

You pointed out that we need some sugar in our diet. Your body does not need to consume any sugar to survive. I'm well aware sugar has many forms.

There is no dietary need for sugar. Our body DOES need glucose, but you don't need to eat sugar to get it.

Your body can and will make the glucose it needs from non-carbohydrate precursors.