Avoda Zara is not something that happens to you. The Gemara is very specific about what connot be done because of Avoda Zara. Getting healed is at worst a problem of causing you to believe in the healer’s faith. If the healer doesn’t profess any particular belief, what’s the problem. I find that people yell “Avoda Zara” because the have a hard time believing it in the first place. What would you say about wearing the tooth of a fox.
Kishuf is the same. You can not be doing Kishuf without realizing it. What is wrong with the belief that there is a flow of Chi that has to be cleared, or that a correct thought pattern can be channelled telepathically, or that one Mazal can influence another?
I’m sure the next argument is that it takes away from Emuna. Being that I never heard that complaint with regards to going to a normal doctor, I don’t know why it would apply here, if not for the fact that you aren’t open to the whole concept in the first place.
For the record, I never went to a non mainstream doctor and I an not one myself. I am just open minded enough not to reject anything I hadn’t seen, offhand.