Someone who went to HackReactor & got a job at Airbnb making 6 figures was telling people not to go to a Bootcamp because the job situation is getting worse and all the best parts of the course are available either for free online or $10 on Udemy (vs $20k for the bootcamp).
Why should anybody go to a 4 year university if they can do a $10 Udemy course? Even a bootcamp of questionable quality still confers some sort of credential, much like a Bachelor's degree does.
Edit: For context, his argument is basically: "If independent learning is not your forte then that's a much larger problem, because you will need to do significant independent study regardless of the bootcamp."
It's not a great argument. Yes, being able to learn/research independently is an important skill that everyone should have, but it's a spectrum. Teaching yourself programming in six months through self-study alone is VERY FAR along on that spectrum. I would bet there are far more people who can get a job with the structure/forced deadlines/etc. of a bootcamp + a heavy amount of self-study to improve their skills, than there are who can do the entire thing themselves.
Also, self study is far from the most efficient way to learn most things. Having someone to help unblock you when you have a bug you can't figure out, or when there's a concept you're not quite grasping can make a huge difference in your overall rate of learning.
https://www.youtube.com/watch?v=bSgsX80ymF8