Your use of "we" is overly broad for the points you are trying to make. I see no reason to believe the mindset that you imagine everyone to have is one that they actually have. It looks to be merely a good straw man soap box for you to preach from.
There is reason, though. For example, there is stigma against chiropractors [1]. Some nutritional supplements have been found a scam (rightly so), but the baby got thrown out with the bathwater [2].
Have you heard of sound therapy? Laser therapy? NLP? These are therapies you probably would never hear at a traditional doctor's office.
All you're saying is that people don't trust these things. You've not demonstrated any rational reason that they should trust these things. So that stigma was rightfully earned, there was no baby in the bathwater, and therapies that informed doctors do not prescribe are therapies that are not known to work. And it is not your doctor's business to experiment on you when the outcome of a treatment is not reasonably certain.
