I'm nit exactly seeing the framing, in this instance.
HFCS is commonly associated with junky foods. Those are bad for you. Check.
HFCS is part of a generally high in sugar diet. Yep, got that.
HFCS may be contaminated by pesticides, or produced by GMO crops. Still on board.
I think the science question is, where does the risk originate?
If you had HFCS that was organically grown and used it sparingly, like maple syrup, would it be worse for you than agave nectar, or sorghum, or any other such substances? I don't know. Other than the omnipresence of corn in our diets.
I think the folks quoted are saying that. They're saying, 'Let's not quibble about what kind of sugar...eat less sugar!"
We cut back on HFCS, around here. Some days it probably makes a difference, and some days it just means we have a junky diet with no HFCS. I'm not sure those days are, in themselves, significant.