Why are there whistleblower films?

Or why are they not censored in the sense of little advertising or not recommended at Netflix e.g.

Let's take the film What the health, which can be seen on Netflix as an example.

It says how our food makes us sick and how billions are at stake for the medicine and healthcare sectors.

Shouldn't someone sign a contract with Netflix (if there's so much money) so that it is not recommended?

Whistleblowers are an important corrective to a lying structure. They uncover what should be uncovered in the interests of people.

The system tries to turn off these pressure relief valves of conscience. It is immoral.

Whistleblowers are the heroes of the information society and should be honored and valued.

Films can contribute to this.