Virtually always may me a little stronger than I'd say, but basically we agree. I can think of a few medical examples of useful treatments being badmouthed or even banned due to the efforts of pharmacomedical business. I don't know as much about other fields.

Example: The amino acid tryptophan was banned in the US due to one bad batch, a very short time before the first SSRI was introduced.

Of course some so-called medical treatments DESERVE to be badmouthed but that's entirely another matter.