Since placing fengshui items at the correct place is not idols worshipping so why is it a sin for Christian?

I'm a Christian and have never heard of fengshui being called a sin. In my opinion, I think it's sorta silly to arrange furnishings inside and outside of your home to gain a certain energy or mood. I think maybe it's called being supersititious, like a 4-leaf clover being good luck. I don't believe in superstitions either. They're basically ridiculous! A black cat crossing your path brings bad luck? Only if you swerve to avoid hitting the cat and hitting a tree. That would be your fault, huh?