User blog comment:DYBAD/Character Sheet/@comment-4867780-20171201004728/@comment-4867780-20171215094415

For the same reason you don't start a game with all the powers and skills unlocked : because past the initial amazement it simply breaks the game and ruins the fun. Your appreciation of them fades in no time, and your general satisaction crumbles alongside.

A well-oiled balance of personal decisions and motivating rewards is a hell of a lot more fulfilling on the long run, and that's why virtually all video games follow this pattern instead.