What I get: There is a base line of unattractivety which Amazon crossed. Working under the conditions Amazon provided in that specific program effectively reduced overall utility. Which in turn means that being homeless without that job is better that having a job like that.
No, what I got was that the terms of the job were not communicated correctly, possibly not presented at all. It depends on who at the YMCA was doing the recruiting. Was it an Amazon rep or someone at the YMCA just selling a dream?
Warehouse work isn't fun. My employer has a large number scattered across the country and picking and stocking requires some hustle to meet customer demands; ours is more sensitive as we pull for both overnight and on demand. Still there are many people who keep these jobs for years, if not using them as a springboard into better positions within the company (most of our older executives came from pullers). Amazon may or not have a path out of their warehouses, I don't know
That should tell something.