Yes, you still need carbs — but the correct type.
I made this mistake with my mum. She had type two diabetes, and I mistakenly thought that eliminating carbs was the best thing for her. The problem was that we all needed added nutrients like fibre in all the healthy carbs sources. Foods like sweet potato and oats are lovely. They are slow-releasing carbs and, when eaten at the right time, help control your blood sugar.
I once advocated for the keto way of life, and I made that mistake. It works for some people — but not for everyone.
I hope this explains that statement a lot more. It’s all about eating the right kinds of foods.