Except, just try it. Try to exclude them from your diet, and see where you wind up.

And at this point, we can see that there’s nothing to your argument except pedantry. You use vague blanket statements “all” and “carbs” but link to a specific article about refined carbohydrates only, which really doesn’t cover the total scope of “all” carbohydrates.

Carbohydrates are a chemical class. You get carbs when you eat fruits and vegetables. Those are carbs.

People who go vegan have to deal with managing their carb intake all the time, and guess what? It ain’t just because of bread, pasta, rice, whole grain, flour and sugar. The sources of protein for a vegan diet often bring carbs along for the ride. Legumes bring carbs to the table. Quinoa is really popular, but includes a carbohydrate load, even though it’s a good source of essential amino acids.

If carbohydrates aren’t an essential aspect of metabolism, then can you explain the role of glycolysis as an input to the Krebs cycle? Need a link for that?

https://google.com/search?q=glycolysis+krebs+cycle

Have fun.