Quickly skimming, am I correct in assuming they are only looking at meals that contain a high carbohydrate load? Considering that a popular theory for avoiding

Quickly skimming, am I correct in assuming they are only looking at meals that contain a high carbohydrate load? Considering that a popular theory for avoiding bad post-prandial glycemic responses is to avoid eating a lot of carbs, this seems...curious. Or did I misunderstand? (E.g. https://www.youtube.com/watch?v=SzcOz38FjaU&t=2s https://www.youtube.com/watch?v=SzcOz38FjaU&t=2s)