You can think critically while simultaneously using exaggerated figures for emphasis. Especially when the figure cannot be precise.
The argument is that these people are choosing to do this. They can choose to spend their time however they please. They know the full terms of the offer, and they choose to accept. There are people in the world who would cross oceans and deserts just to be able to have the opportunity to accept a similar job.
The poor in the USA live better than kings in other parts of the world.
You do realize that humans have toiled in misery, scraping by and fighting for their lives for 99.9999999% of our history right?