No, guidelines say that at least 50% of energy should come from carbohydrates. This ratio is exactly what the article is criticizing. And of course, carbs are converted to sugar in the end.
You're not going to be at risk of metabolic syndrome with a diet composition akin to a traditional okinawan diet.
> Chronic high carbohydrate consumption — especially of refined grains and added sugars — drives obesity, diabetes, heart disease and other metabolic disorders.
The result from a decrease in fat consumption is that the carbohydrates (or proteins) need to be increased. The energy needs to come from somewhere.