Having lived overseas, the US isn't a "veritable wonderland of consumer choice". There are 5 grocery store chains, for the great majority of the country there is one way to travel: car. At the store (Kroger), I can buy 2 kinds of salt on the shelves. Where is the "veritable choice"? It has been told in the advertising but the reality is very limited.
There are scores of grocery chains in the US, not 5. There are thousands of independent grocery stores. And literally hundreds of salt options, even at Kroger.
Seriously. Even the most basic supermarkets stock like at least 10 different kinds of salt. Iodized, non, kosher, sea, for grinding, packets, in disposable shakers, etc., and often a couple brands, e.g. Morton and Diamond. And a larger supermarket will have pink salt (Himalayan), various fancy sea salts, fleur de sel, flavored salts...
The "veritable wonderland" is big cities; come visit NYC or LA. Also affluent smaller cities. Elsewhere, it depends. You can reach parts of the consumption cornucopia by accessing sites like Amazon from basically anywhere in the US though.
Meh. This scenario does not seem broadly representative of the US to me. I mean, I don't live anywhere exceptional and near me alone there are Food Lion, Harris Teeter, Wegmans, Trader Joes, Aldi, and Whole Foods stores in addition to the grocery sections at Walmart and Target. And if one drives a little further, there are Publix, H-Mart, and several smaller local outfits - Compare, Li Ming's Global Mart, etc.
And just Food Lion alone has probably half a dozen to a dozen different salt varieties on the spice aisle.
I'm sure there are places in the US where choice is more limited, but that's the thing about a country of the size of the United States... you can find all kind of scenarios in different regions.
I've lived in a few overseas countries and consumer choice is absolutely limited. As a result you see a lot of people trying to import things they want that they can't otherwise get in their country.
If your hobby is cooking, good luck getting Arabic food ingredients in say Vietnam.
But in the US? If your own city doesn't have a store that carries them, you could easily order them online for next day delivery.