In my wife's home country a salary of $11k/year is considered typical. Some make a lot less, some make a lot more. So a lot of people get by on about 6k/year.
In my state minimum wage is 16/hr or $33,280. Almost all jobs pay substantially more than this, but if all your costs are day to day are food, transport and renting a room with family/cousins/etc you can afford to send $6000 aka $500/mo. It's way less than rent anyway. $500/mo can trivially feed a family in most of latin america for a month with some leftover. If you have that much a month you can absolutely survive, but don't expect any luxuries. AC is unheard of. You probably have a tiny portable washing machine for clothes, the kind kids get for their dorms in the US. You hang your clothes out on a clothesline. Electricity isn't 100% stable, brownouts are common and so is service interruption. Generators are a luxury. You can't drink the water without boiling it, so everyone drinks bottled.
My wife was more likely to only send $100-200, because even that little makes a major impact and in the US where we are, it doesn't do very much. $1 goes a lot further in places like, Venezuela, Dominican Republic, Peru, Ecuador, El Salvador and many, many more countries in the Americas than it goes in the US.
When my wife went clothes shopping in the US for the first time she thought Primark was incredibly expensive. They're known for being very cheap low quality clothes in the US. Still way more expensive than clothes in her home country (aside from the typical imported luxury brands that few can afford.)
At the start of the pandemic my wife's mom sold their condo in a wealthy portion of their capitol for about $ 40k US. I just bought a condo that is slightly bigger for about 600k.
So yeah, you can X to doubt all you want but I promise you really don't know what it's like in the overwhelming majority of countries in the world. It's impossible to understand if you haven't even been to a place that doesn't speak English.
Minimum wage in massachusetts is $16/hr or 33,280.
Here's a furnished room for rent, 995/mo aka 12k/year - well within minimum wage budget above, just a hair over 33% of gross. https://boston.craigslist.org/gbs/apa/d/roslindale-995-furnished-room/7813596105.html
here's another, 1100/mo https://boston.craigslist.org/gbs/apa/d/somerville-roommate-situation-br-avail/7813966888.html
689/mo room for rent (lowell but still possible to find minimum wage jobs near lowell.) https://boston.craigslist.org/nwb/apa/d/lowell-brazilzian-room-mates-furnished/7807989802.html
975/mo https://boston.craigslist.org/gbs/apa/d/everett-private-bedroom-975-month/7811735244.html
There's no shortage of rooms for rent that are affordable for a single minimum wage income. You're just not living on your own. Isn't the trope that 4-6+ immigrants all live together in one house? because that's what they do to minimize housing expenses. You don't need a great home to survive or thrive or to even raise kids... because the listings above that we consider actually end up being less finding a random stranger on the internet and more extended family focused where you find family or friends of family who have immigrated to the US and already live in an area. Here in MA that is a mixture of different cities depending on what cultural group you're from.
Now let's take a look at a poorer state like Georgia. 7.25/hr minimum wage, or 15k/year. This one will be harder but I suspect people will largely make way more than that since walmart pays closer to 10.
$175/mo https://atlanta.craigslist.org/atl/roo/d/atlanta-atl-marta-furn-mid-age-man-free/7810363955.html
$400/mo for a trailer (eww, but doable... 4800 a year) https://atlanta.craigslist.org/sat/apa/d/thomaston-mobile-home-for-rent-in/7810137528.html
495/mo atlanta highway loop https://atlanta.craigslist.org/sat/roo/d/red-oak-great-room-available-in-college/7813455844.html
That being said, there are some cheaper places out there. $250/mo (incl utilities) in the heart of the city for a room but women only https://atlanta.craigslist.org/atl/roo/d/atlanta-seeking-cool-roommate-for-old/7813271349.html
Some (likely) gay dude wants a gay dude to move in $350/mo https://atlanta.craigslist.org/eat/roo/d/decatur-sharing-accommodation-with-gay/7814264684.html
If there are situations where you can split a rental even there for that cheap... how can anyone even argue that it isn't at all possible to survive on minimum wage?
I get that most people do not want to live with strangers or anybody at all if they can help it but it's a much better option than being homeless or living in a country where you will be paid a couple hundred bucks a month.