The dining table faces the corridor and the bathroom is at the end of the corridor. Is there something wrong with Feng Shui?

I never believed in Feng Shui. Mr. Feng Shui said:

1. Don't put the crystal ornaments on the windowsill, because when there is sunshine, the crystal will focus on igniting the flammable parts next to it.

Don't stick the bed under the window, it may make people catch cold.

Don't face the room door in the indoor toilet, because the toilet is the dirtiest place in the whole house, and the dirty air is not good for people's health.

I believe what he said about Feng Shui! Because this is a physical phenomenon and a scientific truth. Mr. Feng Shui said that the dining table facing the bathroom is not good either.

I have a friend who runs a restaurant, and the dining table faces the corridor. At the end of the corridor is the bathroom. Mr. Feng Shui suggested using the screen next to the dining table to crack it.