When soldiers breach, why does the point always go right?

I'm speaking purely from the Army's perspective. The Marines or foreign countries may teach to always go a certain direction, but we definitely do not. It would be very stupid to do so, since it would make defending against an assaulting team quite a bit easier.

He does not have to go right. There usually is no SOP for that, because the nature of room clearing requires the first guy to make a lightning-quick assessment on which path he needs to take, based on the shape and contents of the room.

Most guys I know (myself included) will generally either "button-hook" or follow the path of least resistance just about every time, regardless of whether that means going right or left. I prefer to hook, which means if I'm stacked to the left of the door, I'm going to go to the left. Following the path of least resistance would mean doing the opposite.

Let's say that the door opens inward, and the breach man is kicking it open. When it swings in, whichever guy moves in the same direction that the door swings (#1 or #2 man) will smash the door with his shoulder as he passes, which will tell if somebody is behind the door. If there is, then he will shove his body weight into the door, pinning him against the wall while continuing to cover his sectors of fire, and alert his team through whichever means his squad has previously rehearsed that there's somebody in the dead space. One of his buddies will help finish off whoever is behind the door.

The most important thing is for the first two guys to get into the room and cover as much of the room as possible. They kill immediate threats on their way in, check the far corners, then sweep back inward, although a really slick team can easily have their third and fourth guys covering down the middle first.

That's a very simplified explanation. Clearing rooms is a lot more complicated and dangerous than most people outside of combat arms realize, and assuming you had the element of surprise to begin with, you're probably going to lose it after the first breach, which makes it that much worse.

If the person is left handed they may go to the right in certain situations because it's easier for them to turn the corner without much exposure. Marines and the Army operate in a similar fashion in terms of clearing rooms at a basic level. Units and leaders may execute differently a bit depending on the environment, the tactical situation, team members' capabilities and team leader preference. If we use a breaching charge to bust the door, that person behind the door is gonna be stunned and exposed.

He doesn't always go right it's at his discretion and the other follow suit according to TACSOPs on how they are taught to clear rooms. He can can go left or right follow the path of least resistance or not. The others are basically on his heels and if the fire team has done it enough times and they have competent NCOs it goes by fairly smooth.

but if someone is right, they have a clear shot at your head.