Isn’t this because most waste is passed onto the consumer?

No, it’s because the headline is bullshit.

There are tons of edible foods being thrown away by non-consumer entities. Farmers don’t even bother with too small potatoes or carrots, because it’s not worth the effort, tons of produce spoil during transport, supermarkets throw out everything that isn’t perfect, restaurants, cafeterias, etc. throw out everything they can’t sell during the day.

This is typical “blame the individual” crap, just like the carbon footprint, so we question ourselves, and don’t ask for regulation of corporations.