Why can't the fireplace be aimed at the main entrance?

This is from the perspective of feng shui, but the disadvantage of facing the door is that the wind in the fireplace will be reversed when the door is opened, so it is best not to face the door, but the most important thing is from the perspective of feng shui.

There'd better be water across the hall. Have you ever heard of the Fortune Pool?

If you look at other brands of fireplaces, there is a website with many fireplace brands.