Your wrong. The ingredients for most junk food has changed from the time they were invented. Here's an article I found about some of it because I don't feel like typing.
https://wellhumans.com/functional-medicine/2017-11-25-twinkies-arent-made-the-way-they-used-to-be/
But if you feel like reading in detail about it, this is a really interesting book. Warning, it makes you want to avoid a whole lot of popular foods.