Complex carbohydrates, such as fruits and vegetables, are universally viewed as healthier than simple carbohydrates like sugar. Why are complex carbohydrates a better dietary choice?

I'm not a biologist, so I don't know the actual answer. But my best guess is that there is more in fruits and vegetables than just simple sugars or even complex carbohydrates. There are vitamins for example. Some of the vegetables have simple proteins which are much easier to break down that the complex ones found in meat.