They aren't perfect. There are cheaper ways to learn. Instructor quality is uneven, and the tendency to hire their best students as instructors means that many instructors never see real-world applications.
But the cynicism about their intentions is misplaced. The people who run bootcamps are generally passionate about changing students' lives.
The students I know all said the bootcamp was a great educational experience.
Rather than pump up the employment numbers with fluff, our bootcamp was careful not to inflate numbers (for instance, not counting the people we hired internally towards the placement rate).
That's just my experience with one bootcamp, and I'm not saying it would have been right for you.
But that level of cynicism is totally off-base.