@Brunneria I think the difference is you have your own insulin production. As I mentioned above, I believe the affect of physiological insulin resistance is different in Type 1s because we, by definition, lack insulin. Also, of course that then affects any recovery of sensitivity for Type 1s, and also can greatly affect insulin requirements.
I appreciate you're a diet treated Type 2 so probably not familiar with the use of insulin, particularly in Type 1s, but such an IR can mess up ratios and insulin doses greatly. As a related aside, it's also generally easier to bolus for meals that contain a moderate level of carbs as you don't have to bolus for the protein unless you're having a large amount.
As Cath P says above, controlling fat can help, but then, of course, you have to eat extra protein to maintain weight and that adds to the bolus calculation work. It's no simple answer.
LCHF is no magic bullet unfortunately - not as far as Type 1 is concerned.
A note about my use of the word 'shocking'. I don't mean that I'm shocked my body would do that, but I do mean I'm shocked at the effect physiological IR has on insulin requirements, and I'm always shocked when I read about Type 1s of a similar build to myself who are using far greater amounts of insulin than I am even though they're eating a fraction of the carbs.
So yes, it's normal and not pathological, but it is still something I would hate - because of the effect on insulin dosage and general Type 1 management.