I think of bootcamp in the same terms of the finance bootcamp I took coming out of college. It was a 1 month program mandated by my employer as focused learning. Both have been supplements to my undergrad, not replacements. The ones you mention I see more as a trade school, which I think is a different and potentially viable career path. The reason I say viable is because:
"Autoregressive Conditional Heteroskedasticity"
It's my favorite terminology from undergrad. It's from time series analysis. My job coming out of college was as an equities trader. It's hard to get much more time series analytical than that, and yet I never used it even once. Had I gone into quantitative finance, I'm sure I'd use it constantly. 95% of us just use our undergrad as a permission slip to join the real world, CS included. They hand out those permission slips like candy. Most people end up as accountants, not mathematicians. You don't need to know parametric equations to calculate EBIDTA.
It's not a waste of time if it's something you're interested in and you're intelligent enough to use it. It IS a waste of time getting an engineering degree if you think it will give you a leg up on competing for a welding job.
