No. Classical Feng Shui is based on physics, cause and effect. If you implement the recommendations as stated, a cause, an effect will occur. There is no need for anyone to believe.
Classical Feng Shui has been in continuous practice for at least 5,000 years with a proven track record. It is based on cause and effect. You do not have to believe in it for it to work. There are no chants, affirmations or intent involved. You just do and forget it. Let the laws of physics go to work. Although most books available in English are based on Western Feng Shui it produces less than consistent results. It has been around for about 25 years and is based on intent. It is often referred to as “Folk Lore” Feng Shui. As with most Folk Lore there is some basis of fact in it, however, it is predominately just Folk Lore. The strong emphasis on placement of nick-knacks, chanting, intent and belief create an outcome that is based more on the efforts of the client than the principles of Feng Shui.