I think the best people for jobs like this are those that just want supplemental income. Teenagers, College Kids, Part-time or temp workers.
And I'm pretty sure that the people who do it for their job, if they aren't able to find another one, would miss it.
Automation can be good, but we can't forget that these are actual people, with rent payments, food bills, and possibly families, that are currently doing these jobs. Blindly following the "Automation is great" mantra, while forgetting about them, is going to be disastrous.