Correct, but most of them do use it as a preservative. I agree the article should address this instead of just saying processed meats are bad. Also, high quality vitamin C can block the nitrosamine formation if you consume it with your processed meat.
https://www.youtube.com/watch?v=yxWRxtS_cGI
http://store.naturalnews.com/NanoNutra-Liposomal-Vitamin-C-1...
http://store.naturalnews.com/Optimal-Liposomal-Vitamin-C--5-...