A systematic review of the the evidence supporting current recommendations for significantly lowering sugar intake says they are based on weak evidence. However, an accompanying editorial says this is not trustworthy because it was funded by an organization (ILSI) supported by Coca-Cola and other food and beverage manufacturers. These are similar to claims made by the tobacco industry discrediting evidence on the harmfulness of tobacco.
PositiveTip: It still makes good sense to avoid excessive refined sugars in order to lower caloric intake and the risk of obesitiy.