Every time I search something like “Why is X bad?” on reddit or other forums, the majority of comments is always people arguing the exact opposite. This has been my experience countless times over the years. Recently I started searching the opposite of what I want to know, like “Why is X good?”, and it works flawlessly.
Many snake oil products do this as a marketing strategy.
Search for “is X a scam?” will have the first few results be paid promotional blogs. “Is X a scam? Actually, it is amazing! It brought my hair back and gave my dog healthier teeth blablabla”