Agreed. It feels like the author just took a quick scan of the title and then went on their own rant about how it's the FDA's fault for not regulating sugar levels.

Toxicity is about dosage and exposure. You can have sugar. It's safe. It was in my food this morning. It's been in the food I've eaten almost every single day of my life. At reasonable levels.

What the publication looks into is "high" levels of sugar:

We also tested whether the number of years a country was exposed to “high sugar availability”, which we defined as at least 300 kcal/person/day (twice the upper recommended daily limit for men, [25]) had a relationship with diabetes prevalence, by introducing a count variable for the number of years exposed to high sugar. Under the hypothesis being tested, longer exposure to sugar would correspond to greater effects on diabetes risk. We found that each extra year of exposure to high sugar availability was associated with an increase in diabetes prevalence of 0.053% (p<0.05) after all other control variables were included (Table 3).

Not only that, almost no analysis is done as to why an FDA regulation is necessary. Where is the comparison to nutritional education and improving food availability? Has he never heard of a food desert?