Exactly!!! I feel like you already wrote down what I would have written. People need to learn what a carb is. What a protein is, what are fats and fiber. Then they have to learn how the body metabolizes those foods and
combine them in healthy
ratios. Replacing one carb with another doesn't change things.
And any breakfast or lunch one eats with bread can also just be eaten without the bread. I go to Subway all the time, order a sandwich topped with extra veggies and then ask for a knife & fork. I open the sandwich, (it has gotten easier since they now have flatbread, that lays open & flat,) and I use the knife & fork and eat the FILLING and leave the bread. just because it's there doesn't mean I have to eat it.
Other places, I'll order a sandwich and have them wrap it between two lettuce leaves instead of bread, so I can still hold it.
And if I just want chicken salad or egg salad, I pack it in a pint size, plastic take out container and eat it with a fork. No bread.
Those plastic containers are good for ANY foods you want to pack. There doesn't need to be certain categories of "lunch" foods and every thing else is off limits as they are "dinner" foods. If you made a healthy meal at dinner the night before, and you want it for yourself or for DH for lunch, put it in a plastic Glad container. They are great because they are leakproof.
Sandwiches were invented because the Earl of Sandwich was playing cards and wanted a free hand to hold a non-drippy food to eat and still play cards at the same time. The other players loved the idea and asked for a "sandwich" too from the same chef. Then it caught on as people on trains wanted an easy food to hold while traveling and didn't want to carry utensils.
But you and DH have your own business and can sit down and open a few plastic take out containers and eat ANYTHING as your healthier lunches: salads with sliced hard boiled eggs and/or chick peas, bean salads, zucchini pasta with a cold veggie sauce, hummus with veggies to dip, cold sesame noodles made with Barilla ProteinPlus pasta, mini veggie quiches you made a couple days before, mini fritatas, grilled veggies with a few sticks of cheese, quinoa pasta with veggies. If you invest in a small microwave for work, then you can heat up bean chilis or homemade lentil soups or warm quinoa entrees.
I
only have sandwiches (minus the bread) when I'm on the run and don't want to carry a lot with me and they are quick to assemble. Otherwise, I eat everything other than sandwiches. Same for breakfasts. I don't eat usual "breakfast" foods like fatty sausage or bacon, or carb laden pancakes or french toast.
Even "good" fats will make someone fat, if eaten in excess. Sometimes people will replace a "bad" fat with almonds, a "good" fat. But then eat 20 almonds, (instead of a healthy 6-8 almonds) which is probably more fat than when they were eating something bad & unhealthy.
Like a PP recommended granola bars. I haven't researched those brands, but many granola bars are high in fats, sugar, carbs & salt. One might as well eat a candy bar and have the satisfaction of eating a candy bar.