What if someone richer than the peach grower took a picture of the peaches, and then demanded everyone else pay them instead of the peach grower for copies of the photo of the peaches? Would you still be upset if the peach photographer didn’t make money from every single person who obtained a copy of the photo of the peaches? In some cases, the peach grower got paid before the photo started being sold, in other cases the peach grower gets 0.0004% of the profit from each peach photo sold.
They can be both because the jobs they work pay too little to live on, so they need welfare to survive.
Of course that’s true for most jobs that non-immigrants work too, but a few cents more and you’re suddenly not eligible for grocery money.