Carbon steel is not stainless. It can be thin because it conducts heat somewhat evenly than stainless steel. And many roasting pans are thin in general because they don't have to conduct heat evenly to do their job.
As to why they'd make it non-stick, who knows. Carbon steel should develop a patina over time to be fairly non-stick on its own.
But it doesn't make sense to me to make a modern roasting pan from carbon steel because it's a reactive metal and roasting is all about prolonged exposure to foods, including tomatoes, wines and even just drippings that would penetrate the patina and promote rusting. That must be why they coated it with non-stick.
Sounds more like a marketing gimmick than performance.
Phil |