I mean, you can get everything you need there. I don't think its that hard to cross the border legally if you are Mexican or American. And if there isn't any store like that near by in Mexico, its probably not that big of a hassle. In some parts of the US, you have to drive 30 minutes to get to a place like WalMart to buy office supplies or clothes.
https://apps.cbp.gov/bwt/mobile.asp?action=n&pn=2402
No idea how common those wait times are, but that is only one way and some times are significant.
I guess it might not bother some, but I would not do that.
Ciudad Juarez has a population of 1.3 million, they have to have big box stores.
Or are prices that much better in the US?
I would be surprised if prices are better in US than in Mexico, but then again, we subsidize a lot of food so maybe food is cheaper here than in MX.
They seriously don't have a place to shop in Mexico?
I can't imagine going through the hassle of crossing the border just to pick up some fucking groceries and cheap plastic crap they sell at walmart.