>>12492767Because a placebo effect is rooted into your communicational habits. You grow up, and day by day without you realizing -most of the time- you integrate yourself into a societal system that encourages "placebo" symptoms. They come as a byproduct of generating trust, more or less they are overcompensation, for the times you require such trust to observe some effect, a result, an event etc.
It's impossible to get rid of them since this process of "trusting" is necessary for the communicational operations themselves and for the actors / objects that perform them as well as their interrelations.