Where I live, entire towns have sprung up around Amazon warehouses and the huge influx of workers this brought with it. If picking jobs are eliminated, this will be quite the change for those areas.
This happened in the UK when some of the large industrial companies shut down. British Aerospace in Hatfield was a fine example. It destroyed the whole area for the best part of 20 years.
I was recently driving in a rural area near a UPS warehouse. I could not believe the amount of cars/traffic lined up on a rural road pulling into the warehouse to go to work.