I think they are not lying, but they don't have many experiences in their field. I can say that because sometimes the doctor making a wrong analyze for his patient and one doctor can be different from the other doctor because his experience cannot be the same and cannot compare. Besides that, the case of every doctor is the same too and to handle the patient will be different too.
Sometimes patients may minimize or exaggerate symptoms to avoid key clinical issues) So doctors also sometimes need to lie (smart move card) to get the right results (answers)