i’m guessing one or more of the following happened 1) the traffic was not back to 100% instantly and they ramped it up over a longer period of time 2) they offered the people that were fired the option of temporarily keeping their job while they figured out their “new careers” 3) they started training asap and they also relaxed some of their standards/requirements when it came to hiring.
It probably was not as swift and badass as it’s portrayed now.