But, for example, I was told that homeopathy doesn't work for me because I don't believe in it. And I think what the OP says that it's OK if "it" (in this case, microdosing rather than homeopathy) doesn't work for you then that "is OK too" is something I hear the most not from people who find that, say, aspirin doesn't work for them but ibuprofen, or paracetamol, does; but rather what I hear from people who take a remedy that not only has no effect on others, but has no documented effect on most people and has no clear mechanism of action, other perhaps than the placebo effect (which I understand to be regression to the mean).

So that's why I'm skeptical. With normal medicine, drugs will have an effect on some people or others regardless of whether someone believes they will or not, but with alternative remedies, they will only have an effect on those who believe in them and we can only observe the effect by asking them how they feel (for example, no homeopathic remedy will ever reduce blood pressure).