For insurance reasons, most point fighting tournaments are full contact to the body and no contact to the head or face.
In theory, a well trained fighter should be able to apply a full speed, full power punch or kick to a "focal point". The focal point is in the "mind's eye" of the fighter, and it can exist anywhere in 3D space. For example, the focal point might exist just in front of the chin, or it could be the chin itself. The focal point could be just in front of the nose, or it could be the nose itself.
Therefore, when a martial arts point fighter throws a punch or kick to the focal point, no matter where it exists, it will be executed at full power and speed.
So "in theory", if one practices correctly with this "focal point" concept in mind, then the point fighter should be able to execute a lightning fast punch or kick to any area on or around tne face or head and be effective in street situations.
That's the theory in point fighting, but unfortunately, point fighting practitioners have lapsed into a "tag fighting" ritual, where instead of focusing on a focal point, they tag an area around the face or head, then pull tne punch back, without assuming that the opponent may have survived the punch; that is, the "tag" is made, and the fighter applying the tag pulls back and relaxes his body, instead of first applying a full force punch or kick to the focal point and then being immediately prepared for a counter attack, or, ready to apply a combination, a flurry of punches and kicks.
The judges have also unfortunately been lulled into this method, where once the "tag" is applied, they stop the sparring and award the "tag" point.
It is really quite embarrasing, as now you have a generation or two of American karate point fighters who would not be able to beat a high school wrestler or football player in a real fight. That is, 1st, 2nd, 3rd, and higher Dan levels unable to actually fight.
For this reason, I am encouraging the complete elimination of point fighting because it encourages a sophisticated game of tag as it is practiced. As I said, the theory of full speed and power to a focal point has been lost, replaced by "tag shots", pulled punches, and unreadiness to defend or apply combinations. Hence, a false sense of security is instilled in a successful point fighter, who will one day get his head knocked off by any Joe, trained or not.
As Bruce Lee said, a true martial art involves true combat readiness, and point fighting as practiced is as far from combat as a martial art can be. It is embarassing, disgraceful, and mal-practice.