The first two bullet points on your list are very specific to an american perspective. As a dutchman I do not consider these scammy markets whatsoever.
As an Australian, I do agree with you, but only looking at them from what government services are provided. In terms of the industry, I think health/fitness is possibly the largest in terms of misinformation because no one wants to do simple exercise and eat well, everyone is looking for a shortcut to get bigger or smaller.
So I don't think that they're specific to the American perspective in a larger sense, but I do also see where you are coming from. Then again, neither of us are American!
It's also scammy in the way that the current Regional Healthcare drives out fair competition to a large part.