>When people talk about these cheap meals, I wonder if they just expect everyone to eat the same thing every day at the lowest quality.
Eating cheap doesn't have to mean eating the same shit meal every day. I like to have a framework to work from where I have some structure but can vary it a lot based on what I want to eat. Rice+vegetable(s)+protein has endless variations. One week I might do a taco style rice bowl. The next maybe I do an Asian bowl. Stews are also great for this. By varying the ingredients a bit and using different spices I can get stews with very different flavor profiles that taste great.