Fruit smoothies are an interesting case of a "sugar beverage" which doesn't quite act how you'd think. Intuitively, you'd think that speedy ingestion of that much fructose with all its fiber obliterated in a blender could potentially cause spikes in blood glucose. However this study showed that when the fruits had seeds, like blackberries and raspberries, the glucose peak was lower with blended fruit than whole.
fiber isn’t ’obliterated’ in a blender, it’s only removed with juices. in juice you strain all the pulp and seeds out, smoothies retain the seeds and fiber.
https://pmc.ncbi.nlm.nih.gov/articles/PMC9657402/