I do think there was a bit of a gold rush with fly-by-night programs popping up everywhere; as a result the quality bar for bootcamp grads has probably shifted down on average, but I expect there are still some very talented trying to jumpstart a new career this way.

Early movers in the space like DevBootcamp and App Academy were able to be quite selective about who they took, often picking primarily non-CS grads from elite universities looking to redeploy high levels of baseline intelligence and communication skills into a more lucrative field than whatever they studied at university. That was definitely my motivation once I realized I might never afford a middle-class lifestyle (e.g. homeownership, children) if I kept going in the scientific field I trained for.