Points or PT’s are where your character can be completely unique. You level each PT, or ability, separately and these can help shape your character and how it will be played. For example, you can level your Melee and Force but this would not allow you to wear Ranger equipment, and as such you could not gain the run speed bonus from Ranger Armors.
Another example would be if you are a Force user (a Spiritualist) and you have only leveled up your Force skills; this would leave you with a low Defense, Melee and Range skill, meaning you would have Low HP, could not wear warrior armor or weapons, and additionally you could not use the Bows, Guns and Ranger Armors.