Of course not. But there are varying degrees of evidence supporting the idea that consuming excess carbohydrates (and more specifically, "simple" carbohydrates) contributes to a wide array of health issues.

We know consuming excess carbohydrates is bad for you the same way we know that climate change is happening. The same way we know that a sedentary lifestyle is detrimental to your health. The same way we know that smoking causes lung cancer and a cornucopia of other health concerns.

Science rarely affords us the ability to make absolute statements.