It's not a "problem" per se, it's unskilled, untrained labor and someone with no resources trying to make it.
Not all hard work gets a reward.
Not everyone has a happy ending.
While statistically, you have a better chance of making a "high" salary in the USA, it really also depends on what you do and who you know.
Picking up cans also sounds like they could be undocumented, with no "legal" work papers.
Many times, it would/could be better for someone to stay in their "origin" country and live a regular life, but at the same time, you have to think - "would many people that have a network and a "career" leave everything they have, uproot their close family and go to another country, where even the language is different to pick up cans?
Is that sacrafrice? Is it worth it? Is it even legal? (lols)
As shown with "amiga" in the article - the authors parents also do not know English.
The same happens with many "normal" Americans as well. The ones that are illiterate, have a poor network of friends, uneducated, etc. While we don't hear about it as often, it's pitted away as more depressing/their own fault because "they were born in the USA anyway."
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Nothing against the author, but it reads as poverty porn. Great she accepts herself, and isn't ashamed, and while we may all think she should wear it as a badge of honor - in reality, the more socially distanced you appear to your peers, the more you are.
Pariah is pariah.