I think the issue with Low-GI foods for many is that you have to really work hard on Insulin timing.
With the growing numbers of CGMs and FGMs out there, we've had to re-evaluate the timing of the current crop of fast acting insulins. When you eat a lower GI food (wild rice I find to be a great example) timing is even harder. I found that coinciding insulin action with low-GI carbs action is even harder than "normal" foods. I personally think it's easier to go Low Carb than to eat Low GI, as the reality is that low-GI foods require you to Sugar Surf hugely. Low Carb just takes the carbs out of the equation all together.