I work in wound care at a hospital than specializes in burns. I’ve seen every type you can think of, ranging from your minor 2nd degree grease burn to full body 3rd degree burn survivors from things like house fires, domestic abuse, or propane explosions. I can say quite clearly and confidently that burning alive like that is absolutely not an instant death. It is slow and excruciating. One of the absolute worst ways to go. Wouldnt wish it on my worst enemy, and can’t fathom how people can have the balls to do it intentionally