I guess, when you're the Sausage King, ketchup is kinda like putting A1 on a steak. It blots out the actual taste of the food. It's insulting to the preparer.
Really, I eat Oscar Myer outta the package. I prepare it in the time honored method of guys everywhere - which is nuking them in the microwave until they explode. If I have a package of buns, good. Otherwise, it can ride on a slice of bread WITH KETCHUP and cheese.
This isn't meant to be fine dining. They're tubes of food-dyed fatty gristle that keep me from being hungry for a few hours. With any luck, there's Funyans and a coke as well.