It depends on how they work. All of them will tell you that they work with energies. Feng Shui is indeed part of the study of energies, so everyone claims to practice Feng Shui. But what is it exactly?
It is a millennia-old art that allows the reading of how energies manifest in people’s lives. This place can be a house, an apartment, a business, or a workplace. The energies depend mainly on your external environment and, to a lesser extent, your interior.
The study of this ancient art, which can only be properly practiced using a Luo Pan, explains the life of the people in that space. Therefore, anyone who is unable to explain what is happening inside your home, office, or business is not truly practicing Feng Shui.
It does not matter if the person is focused on business, well-being, or genuinely helping you—they can only be considered a good practitioner if they can explain what is happening in your space. They must be able to provide insights based on these measurements. If they cannot, then that person is not practicing Feng Shui.