Type 1 and Type 2 are completely different diseases. They present similar symptoms -- which is why they're both called "diabetes" --, but their underlying causes are different.
Many T2 patients can control their blood sugar with diet.
No T1 patients can. It has nothing to do with "discipline", it's an autoimmune disease. It's actually a bit insulting to suggest it's somehow "their own fault."
From last year (July 2019), and no follow-up. As someone who has to deal with T1D every day and carefully monitors news about research, I guarantee you no endocrinologist is counseling their patients to try this. Cutting carbs can lead to less need for insulin, but it's not a cure for T1D.