I was a philosophy major who took some CS courses in college, programmed as a hobby and was working as a product manager. The bootcamp was a great way to build an understanding of the production software development process. It also allowed me to build a strong skillset within one tech stack (MEAN).
The bootcamp was absolutely not an end to my cs/engineering education. When I started at Google the learning curve was steep and I have been constantly taking at least one coursera/udacity/edx course for years as well as company internal classes. Hack Reactor wasn't an end all solution but it gave me a great lay of the land and was instrumental to landing a job of the quality that I did.