There's no scientific basis for it but if you're going to look at the perspective of others, they believe that there's also a relation to science. Well, that's what they're believing.
But to me, it's not really related to science and all about the belief that has been passed on from generation to generation and until now, it's still keeps on living.
I think the thing that makes Feng Shui not scientific is that there is no scientific fact that the claim of Feng Shui is true. There may be a study of Feng Shui but it is not under the branch of science.
Yes, that's it. There's no science-based fact on it as to why something happens and the luck of the person believing in it comes. A superstitious belief that we can understand easily.
I believe Fengshui is in the same category as Astrology.
It's actually also used as astrology because of the information needed for a person to know if he's lucky or not. There's connection to astrology and feng shui and that has been widen by the culture of Chinese and other races that believes to it.