If you want to understand a system you need to listen to someone who is intimately familiar with the system, yet apart from it.
People who operate within a system are usually blind to many aspects of the system, as they are taught to play a small role within it, not to understand its entirety.
Just as a fish may be ignorant of the fact that it exists in water, a person who operates as a component of a system may be unaware of broader issues to do with the system, or even it true aims.
So often we either assume or are told the purpose of our system, which turns out to be false.
We are purposely kept in the dark, playing our role for the overlords of the system to achieve their objectives, whether they be for good or evil.
Even if we conduct ourselves in an exemplary manner it does not mean we are contributing to a moral system.
The military system of each country comes to mind.
We may conduct ourselves with integrity, yet we may be contributing to the mass murder of innocent civilians.
Similarly with the medical system. We may be doing our best by patients according to the knowledge we hold, but we may be ultimately just a tool to push profitable, unhealthy products on a trusting clientele.
Examples such as Thalidomide and Vioxx show that the western, chemical-based system may fail dramatically, either through systemic failure, or due to callous indifference to the lives it touches, by those at higher management levels.
A worker within this system, such as a doctor, nurse or administrator, will be at a loss as to how these things happen, assuming changes will be made to stop them happening again, but they certainly don't think any harm caused by modern medicine could be deliberate.
This naive faith in the system of which they are part comes from a lack of knowledge of the basis of the system, and who it is set in place to serve.
Those who set up a system may do so for other reasons than the ones they widely promote. They may claim philanthropy and benevolent motives while being inspired by darker, more selfish goals, indeed.
Only an independent investigator with no ties to the system is likely to discover the truth about a system and who and what it is set up to serve.
If these people share their views widely and come to the attention of those who gain from the system being viewed favorably, they will be mercilessly attacked and "discredited", particularly if they are seen as truly influential and able to sway public opinion.
This is why we see whistle blowers vilified and attacked in the mainstream media for daring to claim the emperor has no clothes and that a system is corrupt.
Public opinion is very important and jealously guarded by the servants of the system in question, and if the system's credibility is lost, then all working within the system will lose as well- lose income, jobs and social status.
Hence, many servants of the system will fight like wild animals against any perceived slight of that system, to keep it running along in the good books of public opinion.
See also: Misled by their own integrity