Seems like the trade school component is being at least partially covered by the Bootcamps popping up. And just like some CS programs expect you to then go out and learn how to be a software engineer (usually via jobs), there's an expectation in these Bootcamps that then you'll go out and learn the deeper/broader CS components you missed out on (usually via jobs).

Perhaps it's just what you heard people tend to do. I also attended DBC and the "general" hours were very cohort specific; even within each cohort there's a huge variation. However, everyone I met during the bootcamp really enjoyed what we were learning, so naturally that led to long hours if there weren't outside responsibilities.