A lot of people don't want to see this. You can see the assumption everywhere here: those displaced workers will just find another job! Well no, at some point they won't. Automation is well on its way to eliminate certain types of jobs entirely and not all of those people will be able to find new jobs elsewhere. Even if they were to educate themselves, they'd come into a job pool which is already too small for the number of applicants, so at best they'd cause wages to go down and conditions to worsen (since corporations can pick and choose). That's assuming they can, which, especially in the US, usually involves thousands and thousands of dollars on something with no guarantee of a return on investment.
We're headed straight into a wall where we'll have people without any skills we need and who are unable, financially or otherwise, to gain desirable skills, as well as higher unemployment across the board. We can't wish them away and they deserve decency as much as the next person.