You eat tons of things every day that are equivalent to X without realizing it.

Would you shy away from foods that have list of ingredients that included fructose and glucose? That's all corn syrup is (and a few random corn solids here and there.)

Apples have a really high fructose content too, so technically drinking apple juice can be worse than drinking a dilute corn syrup solution (depending on the kind of HFCS), but almost no one thinks twice about that because it's "natural." (Although there is a growing anti-juice movement.)

Data from Wikipedia (remaining content is glucose):

HFCS90: 90% Fructose

Apple Juice: 63-78% Fructose

HFCS55: 55% Fructose

HFCS43: 43% Fructose