It's not fear, it's challenging a conclusion made by people based on their credentials. If the science stands up to scrutiny and peer review, then great, but if it doesn't then it's not true.

The quackery label comes in not from the science but from the people behind it and the monikers / titles that they applied to themselves - unrecognized and not formally tested monikers / titles.

The formal testing is so that there's a proven and traceable minimum knowledge and background behind a person's statements. Like a bachelor's degree for a software engineer vs a two week boot camp.