It’s actually very simple. If you think that individuals should be in control of their own destinies, and that groups of people should be able to try to make things a bit better for themselves, then they need to understand their environment.
This is an ethical position about where power should reside, so whether individuals, and groups of individuals, always do make good decisions in practice is a bit beside the point.
The disclosure and distribution of important information sometimes relies on individuals going against the grain. Those activities, and those people, should be protected because they are valuable.
When people find themselves in trouble for doing the right thing and you can see how to help, there is a duty to do that.