At that time people making bootcamps was a way to show that they were willing to learn, a big positive factor when hiring somebody. Today it doesn't mean much, a lot do the bootcamp and believe that they now know everything and that there is no need to do any additional learning effort. And it is difficult to filter those people out to get to the genuinely interesting ones.
That they don't need to study anymore. That they think they've studied enough in bootcamp that they don't need to learn anything else to get a job and be a functional engineer.
