[Yan Wang]

Actually, it doesn't.

When I refer to moving around one point, imagine having a tank drive train... hence, moving forward with one joystick would pivot it around one point. If you had wheels with lots of traction, it'd stick to the floor material well and when turning, would skip up and down causing the robot to shake... hence, smoother wheels would be better for turning around a point. However, when considering gameplay, that's a lack of traction which results in you getting pulled/pushed. Omniwheels offer traction in one axis and rotation in another which allows you to turn smoothly. Using a pair of omniwheels in front and a powerful pair of high traction wheels in the back allows you to get the greatest traction while being able to turn perfectly smoothly.