Because the outside of the general bedroom is the living room or the food delivery room, if the meeting is held outside, it will cause complete insecurity, and it will also affect the beauty of seeing off guests and delivering food, so it will be invisible. It can be opened outward like an outdoor entrance door, and the entrance door will not affect anything.
Please see that all family bedroom doors are opened inward several times. It can be seen that opening the door inward is better than opening the door outward.
Even if some bedrooms are relatively small, it is inconvenient for a monk to open the door after bumping into furniture one day, and the sliding door will not open outward.