This is why I believe we should only listen to amateur opinions on everything, experts simply lack historical credibility. For example I've recently purchased a healing crystal (half off) for only $5000 dollars! It cleared up the imbalanced energies my street guru told me about right away.
I would never have been made aware about the consequences of imbalanced energies in the first place if I had asked an expert instead. They probably wouldn't even suggest an immediate solution to the problem like my reliable street guru always does! Something to consider.
Ironically the street guru hucksters might have a better track record than the dangerous products mentioned above.
Less charitably, it's a mistake to imply that simply being a bigger corporation makes you go from street guru to "expert". Bigger company trying to make money off of you at any risk to you is just the same bucket at a different scale. In this context the other side is probably "expert consumer advocate" since that fits the idea above of these dangerous products advertised as cure alls.