No, the article is bullshit, obvious bullshit.
Warehouse employees are one thing, they really don't need to work that hard to find replacements, but the absurdity of the rest of the article shows it to be written by manipulative pieces of shit that are just working an agenda.
If I'm some genius software designer working for Amazon, I'm having to fight employers off with a stick if I mention that I'm looking for a job. Amazon would be bleeding talent so fast that they wouldn't be able to maintain development cycles if the article were even half true. It takes weeks or even months to get even the best and brightest up to speed in large scale software development, people that can simply walk into a new job and rapidly be productive can probably be counted by hand. They're the Einsteins of their field, there aren't enough of them on the planet to even begin to keep Amazon operational if they're running most of their employees off crying a few months into the job.
Customer service, maybe, warehouse employees, definitely, but this being the culture in their high tech, six figure jobs? Please.
Even the warehouse example isn't actually bad. Air conditioning is a recent invention, being in Hell myself(southeastern Oklahoma), I'm well aware that many of the older businesses still don't have it on account of sweating like a stuck pig on entering them. Auto shops, furniture stores, hardware stores, you name it. This is something that is still in the process of changing, and the older generations that have lived and worked without AC end up having to fire people that can't hack it all the time. If you live in your nice, sheltered home, and then go to work in an unconditioned welding shop when it's 115F outside, you're either going to get fired for not working, or get hospitalized, whichever happens first. Calling the paramedics in when some guy that can't take the heat gives himself a heat stroke isn't being evil, it's the only thing you can do when an employee makes themselves life threateningly sick by ignoring their limitations in pursuance of a pay check.
The reason they're changing to air conditioned warehouses and such is because it's getting harder to find employees that actually can handle the heat, ones that can't aren't worth much as they sluggishly go about their tasks. Heat exhaustion doesn't make for a good worker, it's cheaper to keep them cool.