All 4 points you make in the first paragraph are true. It doesn't translate to better nutrition, though. That might have been a point way back then when the soils weren't absolutely destroyed by chemicals and the crops themselves weren't either. There's hardly any nutrition these days from any processed food, be it canned or frozen TV dinner, or boxed dry like Hamburger Helper.
That is strictly based on soil nutrient depletion. The fun part begins when all the fillers and preservative chemicals are added, along with the excitotoxins like regular useless table salt, sugar, and MSG. Free Glutamate exists in more than 100 different names, so "food" manufacturers can hide MSG without calling it that because of the negative publicity about it. Yeast Extract is a popular form of MSG, which is an unlisted allergen to many people. Manufacturers use cellulose as a filler, which is a fancy name for sawdust.
Most boxed foods have synthetic lab created vitamins added, which will suffice just as much as the foods themselves. The body doesn't recognize the vitamins though. Sure, heavy doses of Vitamin C in the form of Ascorbic Acid will kill off a cold or even Covid, but for long term use, a natural form like Camu Camu is preferred.
While processed foods like MRE's will keep Soldiers alive (and out of the bathroom for 3 days), they aren't something you should have on your home menu. The same applies to all boxed foods and most canned "enhanced" foods that have 70 ingredients. I will use a can of Beans or something simple like that, or a packet of spices if I'm in a rush, but don't buy the "meal in a can or box".
Then we get to talk about the BPA lining of the cans, while some manufacturers say they don't use BPA, there is 17 other Bisphenol chemicals they can use, and most settle for BPS. They don't tell you that, though.
Being that Sugar is more addictive than Cocaine, it can be argued that we are all born addicted to Sugar. Some people are Crack babies, I'm a Sugar baby. Breaking that cycle is obviously up to the individual, and lots of people don't care. I have been legit Obese, have been rail thin and muscular, and am now "Army Obese", which is a few pounds over the scale. I have been addicted to the chemicals in those processed foods, and have NOT been addicted like now. I have quit smoking once, quit chewing once, quit drinking several times, and quit processed foods 90 percent. I can be in Keto like last night, and instead of reaching for a good sugar like Blueberries, I eat Dollar Store cookies. The key difference between me and others is I know the difference, I have seen the promised land, and I have been working out my whole life. I can get back there fully whenever I want, that's my mindset. That's why the only canned goods I have are a stock of Chunky Soup for emergency use.
The challenge is with people that are "struggling" to lose weight but still eat fast and processed box foods. I hear it all the TIME, that's the keyword... Picking up MCD's is easier and more convenient than taking 30 minutes to prepare a fresh, tasty with the right spices, meal. They don't have 30 minutes, you see. They have to sit around for 3 hours doing nothing, followed by 3 hours of video games and 2 hours of those "reality" shows, and they certainly can't wake up 30 minutes earlier to prep everything for a good meal later. There's just never any time!
People are addicted to the chemicals, that's why it's almost impossible for them to get through the food court section of a mall without stopping somewhere. Most of these people have tried the Jenny Craig style of infomercial diet, which only works for Jenny because of repeat business due to those foods being the same thing as you find in the processed section of the supermarket. People don't understand that they can eat 1 Big Mac instead of 2 and be doing the same exact thing as a Jenny Craig diet without paying for it. Jenny charges people to eat less food and feel good they are losing 5 pounds, which they can do on day 1 of a paleo / Keto diet and begin a true turnaround.
Being that it only takes around 3 weeks for the Human body to completely eliminate the addiction to any of those chemicals if the person chooses to do a hardcore Paleo or Keto style diet, preferably with intermittent fasting, it really becomes a choice of whether they want to be fat or if they want to be in shape. If they say they can't do it, then that's the answer.
Then the final argument these people have is they can't afford Organic or healthy food. They can if they only eat one real good meal a day. The very first step for people that think I just wrote a bunch of jibberish is to figure out why the "Food Pyramid" is a bunch of fabricated nonsense that only benefits the quarterly earnings reports of the corporations that make the food products and the oils they use. It also benefits the shareholders, who say Thanks for being fat and dependent!
I recommend the book "Excitotoxins: The Taste That Kills" by Russell Blaylock, MD.