Is it tho? If your body moves 7", the new position of your back would still be behind where your front was, at least for my fat ass. So you couldn’t clear a wall. But if it’s a problem to teleport into a wall, then it would also be a problem to teleport into the air where you’re going. And if you left a sudden vacuum behind you, it would create a dangerous shock wave as it collapsed.
But there’s air. Where does the air go? Maybe you can only teleport in space.