Per Google maps, there is an HEB, Kroger, Aldi, and Walmart Supercenter within 5 miles of what looks like all the populous parts of Texas City, TX.
I am not making value judgments. I just know that the availability of ingredients and knowledge of how to use those ingredients is there for the taking for most Americans.
Maybe people don’t have time, maybe people don’t find it worthwhile to cook for households of 1 adult, maybe people prefer the taste of super sugary/salty/sat fat laden restaurant food.
Edit:
> I mean even if you just open a map the geographical obstacle should be pretty apparent... It's an enormous country
The size of the country is irrelevant. All metropolitan areas have numerous options for purchasing groceries.
https://www.statista.com/topics/7313/metropolitan-areas-in-t...
> Nearly 83 percent of the U.S. population lived in an urban area in 2020, and that number is expected to reach nearly 90 percent by 2050.