Why are parallel fifths forbidden?

when two fifths, in the sense of parallel fifths, sound one after the other in a piece of music, the music is perceived as "wrong" or "disturbing". So far, there has not been a generally accepted explanation for this. In this work, a reason, based on the Theory of Musical Equilibration, is presented. According to this, the fifth in the triad has the role of a background, as it were a stage, on which the third can unfold its sensitive effect in the listening experience. If parallel fifths sound, the impression is comparable to a play in which not only the actors move on the stage, but in which the entire stage shifts to the side with a jerk, which could give the viewer the impression of an unforeseen event disrupted the plot of the theatrical performance. Correspondingly, parallel fifths in certain styles give the impression that something has happened that is actually not part of the composition in question but is faulty and disturbing.