You may need gatekeepers to feel safe in life. Feel free to find a safe, walled garden for yourself. The rest of us live in reality, and recognize that organizations of human beings have always been subject to groupthink and have suppressed new and unpopular ideas. They are also prone to fads and fashion. In the 90s, the medical establishment claimed eggs were as dangerous as cigarettes. They insisted that avocados were unhealthy.
The funding to eventually overturn this bad science was suppressed at mainstream institutions and had to be obtained from the very outsiders you condemn. Phrenology and scientific racism were embraved by the experts for decades. Lucky for us, people didn't follow your advice then.