The person you’re replying to is clearly uninformed but I do want to let you know that like most things involving the human body, this isn’t a one-size-fits-all problem. I did keto but I have nondiabetic hypoglycemia, which is how I got an A1C of 3.9, and how I found out how dangerous that is and that I do actually require some (preferably complex) carbohydrates every day.
I understand nondiabetic hypoglycemia is pretty rare so I still support you fighting misinformation (and especially that no one requires added sugars, which should, by now, just be common sense) but I did want to throw this out there, that folks should absolutely seek a doctor before going all in on a zero sugar diet.