> You burn roughly as many calories walking as you do sleeping.

> Sleeping burns 40-80 calories per hour, walking 200-350.

We must have different definitions of "roughly", that's an order of magnitude difference!

> You're not gonna burn off any calories by walking.

That's a very different claim (but still not true).

To be clear: walking is great exercise. No, you're not going to walk off a 10,000 calorie/day diet with it; you need to not eat that much. Nor are you going to look like you spend 3 hrs/day doing crossfit just by walking. But 10,000 steps per day is miles better than 500.