Corn syrup is very sweet, cheap, easy to process, and it transports and keeps efficiently. It reduces the cost of producing processed foods.
The way to avoid it is not to buy products containing it. If others, however, prefer those products due to price, taste, or any other criterion important to them, who are we to say they can't have them? Putting an end to corn syrup and other additives is not a decision rightly to be made by a few. Spread the word about your views to your heart's content, but respect the right of those who don't see things your way to make their own choices.