I don’t know why, I’m pretty sure hotdogs are more expensive per pound than ground beef at my local shop. 70/30 (which is fattier than I normally purchase) was $3/lb last time I was there, hotdogs are almost double that. Maybe that’s just a local thing?
I think this labelling is just marketing. Given the name of the product contains “hamburger” they can assume anyone buying it already knows they can add ground beef. I think they just added hotdogs to the label to give people ideas about other proteins they can use.
It’s been decades since I’ve eaten Hamburger Helper, but I recall liking it more with hotdogs.





That’s what we used emulsified sauces for (in addition to flavoring) when I was working in kitchens. Mayo for instance is a tasty sauce, but it’ll also prevent the bread from absorbing moisture from the other fillings.