You can, but presumably your situation is rare? GP is specifically making an argument about selection bias, where frequency matters.
I'm not questioning the argument about frequency, I'm questioning the underlying assumption that "success" in a bootcamp is only measured by employment as a developer.
If you don't measure the success of a coding boot camp by "employment as a developer", what would you measure it by?
It's been 4 years since my bootcamp experience and I very, very much doubt I'll ever seek "employment as a developer" again except in the case of failure as an entrepreneur.
Now they're talking about starting code camps targeting other vets, help with transitioning to civilian life, build community, mitigate PTSD, work with kids, etc.
I've been mentoring a number of our senior support folks on coding, and they've been doing something along the lines of a boot camp. My management finds that support team are able to better understand how things work, attempt to debug things they'd have been afraid of, and ask better questions of software engineers. Support engineers get to do something different and are building skills. They have seen "coders" move quickly through support to the engineering team. Another group manages our tools, but I hope they'll be able to hack on some tools for our team. Some people will stay in support, but it should be less stressful because they can understand how things work better. From a distance you can see how the online communications have changes between the two organizations.
From my past experience in Pharma I know there was similar interest from scientists to learn to code (if they didn't already). I also know that some of the designers working on electronic detailing apps for sales at the time really wanted to learn to code because they had to transition from Flash to HTML 5 and JS.
For these reasons, I think that the make up of coding boot camps may surprise some. A differentiation may be related to where someone is in their career. Someone laid off, or without a job is probably more like to jump to a boot camp than someone who has a job. Quitting to take part in a boot camp is probably a huge jump for people, if they are in the tech sector because they may have more awareness of what is involved, or other means to make the jump to coding.
The fact that there is not a single negative response is basically proof positive that people who don't succeed at coding boot camps do not read HN. Unless you happen to believe that almost everyone does succeed after coding boot camps. I find that notion incredible, personally.
That's exactly how my career started.
Which still doesn't mean it is not rare but maybe a bit less rare than you thought it was.
If they are different, one can not make statistics out of the comments here.
Hypothetical example: Say only 1% of coding bootcamp graduates find the program to be a "success" for them. All of that 1% read hacker news and zero of the 99% read hacker news. If you ask about bootcamp on hacker news you'll only get HN reader's perspective, then you'd believe bootcamps are wildly successful whereas the real number is the opposite.