At least if you are a professional in a field.
Because I would expect my professional to be at the level of current science and technology. I do expect my mechanic to think that sand isn't the best lubricant for my gear box, I do expect my doctor to know that it's not a good idea to sprinkle holy water that he got from the holy pond in his garden into my open chest wound and I do expect my IT security guy to know that it's not a good idea to let the new server sit on the ley line in front of our HQ for a night to absorb the good energies.
If you want to believe that, great. But get out of your field of work before you do. If you want to offer "alternative" stuff, move into that profession instead. I am sure there is a market for that too, else people would not have invented that snake oil. But if you are my nurse and responsible for working on my child, I do fucking EXPECT you to give him or her that MMR shots and not avoid it because you "don't believe in it".