I dont use much ketchup. But i do remember my mom lived during the depression and she said she used to eat ketchup sandwiches. I loved to here her stories about old times i bet it was really hard times.
I like the taste of food. So why would you ruin it with some thing else.
That is what I say. A little to enhance, if you will, but when I see people drown their food I just cooked in various condiments to the point that you couldn't taste much beyond that, I just shake my head.