Putting a loaf of bread into a bag certainly doesn't move it from the minimally processed to the ultra-processed category. That false claim is based on the fact that most bread sold in bags is ultra-processed, but it's not the bag that makes it so.
I think that professor of food engineering may have a conflict of interest related to the foods he creates for a living.
So going back to the quote, is the potato chips vs yogurt example accurate?
>That false claim is based on the fact that most bread sold in bags is ultra-processed, but it's not the bag that makes it so.
What makes them ultra-processed then? Even the home made loaf is made from wheat that's dehusked, ground to a powder, and then chemically treated (bleaching). Making it into a dough and then baking it involves even more processing. The final product resembles the inputs almost as little as instant mash potatoes resembles potatoes. The only real difference is the use of dough conditioners and industrial sized ovens, but given all the previous steps, it seems arbitrary to draw the line of "ultra-processed" there.