It's also impossible to figure calories out for each person as we're all different.

I think it's the same for carbs. Between inaccurate carb counts and different individual reactions, we just have to experiment on ourselves to see what works best. To keep my blood sugar on an even keel I need very low carb (20g or less), moderate protein (60-70g) plus metformin. Then I read the happy news of other diabetics who go moderately low carb (100-150g) & are able to lose their insulin & oral meds. And lose weight. It is SO frustrating!