Let’s just say that on my heat scale at a 5 (starting to sweat) most people who think ketchup is spicy would probably be starting to show respiratory problems and complaining of holes in their gut with some of the sauces I love to pour on my food. But, I’m nice to my sensitive stomach Yankee relatives and give them fair warning that such things as even my BBQ sauce has a real “bite” so they can taste cautiously.
I didn’t say “spicy”, just the acid causes problems for some people.