Conditioning for what? Defense against what? It just seems entirely disconnected from my experience, which is "just" a combination of deep relaxation and a sensation of being more alert to (some) mental impulses rather than blindly following them (all the time). It is not a miracle cure for anything. It won't give you mental superpowers. But it offers a different way of looking at things that sometimes offers surprising insights.
I'm sure there are some incredibly poor events for executives and corporate, given the money you can potentially make, but that says very little about mindfulness and more about these types of events.