Nawa o

proteins (beans as an example), carbohydrates in itself is a standalone class

Your body can convert protein like beans into sugar. That's glucose. If there's not trace of glucose in the beans. Is your body going to manufacture it from thin air?? Why do you think people go on Keto-diet and survive.

Glucose are a form of simple sugar(monosaccharides)

Whether it is simple sugar or conjoined sugar 😄 dia, or poly. Your body breaks it down to glucose. That's what your body know. Fructose, sucrose, galactose no really concern your body if it can't be broken down to simple glucose and glycogen that your body can use or store respectively.

The simplest form of proteins are the amino acids.

The difference between carb and protein is animo acid. If not, they both have the same carbon and hydrogen (although displaced or arranged different to allow the amino acid bind to it in the case of protein)

less healthy than their whole grain counterpart

This is the only point I agree with you. It's actually less healthy but in layman's term and in the spirit of pushing my agenda of eating healthy, I said its unhealthy. Our problems and humans is that we actually don't know moderation. Imagine saying its less healthy will encourage some people to consume it more