The thing is, traditional NHS thinking is that:
1. Type 2 is progressive and will eventually deteriorate, leading to increasing medication and ultimately insulin.
2. We all (diabetic or not) need carbs ‘for energy’.
You followed the advice about carbs, didn’t you? And gosh, eventually your diabetes progressed and your HbA1c rose, setting you inexorably on course for increased medication.
You were treading the expected path.
Whereas:
Lowering your carbs => no longer overloading your body with carby starch and sugars => halting your ‘progression’ and possibly even turning it around => a better, healthier, probably longer life.