Spoiler alert: because it’s about having a pool of artificially cheap labor with no rights produced via oppression. That’s why we’ll never actually seriously deport, and why all the laws around it only ever punish the immigrants themselves. Enabling shitty bosses to land people in jail because they had the gall to ask for one too many water breaks is the entire point. And our government spends insane amounts of money propping up this exploitation, making all of us poorer because the people it benefits donate to the right campaigns.