I understand your point — namely that this study isn’t good science and we should not rely on it to draw a conclusion about whether LCHF diets really can cure diabetes. I agree.
But your headline is as misleading as the study. You claim “diabetes can’t be cured with ….” And your article does nothing to support that claim. Just because it is not proven that LCHF cures diabetes, neither is that hypothesis eliminated by the research or your article. Your headline would be more accurate if it said “Research does not establish that LCHF diets cure diabetes.”