This is the same kind of story with my mom. She got a gastric bypass done, stuck to her diet, loss the weight, and now she doesn't even need any insulin or pills to regulate her blood sugar now. Mind you that's purely an anecdote but I thought I relay it anyway since it's nice to see there might be an underlying correlation or benefit others can employ as well.
Keto, vegan, high carb, low carb, - it really doesn't matter in terms of creating a significant energy deficit for a sustained period of time - the best diet is one that an individual can adhere to.
Low carb is a pretty hollow sentiment and the article leaves a lot to interpretation. When most of these types of pieces reference "low carb" what they're mostly pointing to is lowering processed / refined carbs. Meaning processed foods high in carbs and low in fiber. The majority of the time these processed foods also have significant amounts of sodium and sugar as additives as well.
But, just because a potato has quite a few carbs, trading it for processed junk low in "carbs" isn't always going to net the end user a reduction of diabetec risk or make them healthier. It's unfortunate that there's so much focus on carb cutting instead of a shift towards whole (unprocessed) foods as the base of a more holistic shift towards health.