You realize there are no calories in sand, right? You are free to eat as much weight in sand as you like, you'll gain no more weight than what you input.

Ketosis works by encouraging your body to release ketones and burn fat. If it fits the way you want to live your life and the foods you want to eat, by all means go for it. You're not losing weight because you don't eat carbs, though. You're losing weight because you're burning more calories than you input.

Also, not sure why so mad. I was pretty clear: do whatever works for you. The most important thing is consistency.