Putting aside a few bad apples who might go through the hoops on purpose to burn Atlas out of a type, I honestly think it is completely unreasonable to expect ANYBODY to know if they will like anything for the rest of their life after a one-day interview. How many people go to military flight school and decide shortly after going in that it wasn't all they thought it was, despite the hype? Were only human and again, this is only a job.
The way I see it, somebody gets hired at Atlas, decides its not for them then leaves. Fine. Costs the company time and money, which is bad, but won't you have a happier workforce with people who really want to be their? Then another slot opens on the next interview date (hello, still waiting for the phone to ring

giving another a chance.