GMMichael
Guide of Modos
I was not saying that something is oppressing the GM. Nor does a detailed character definition oppress the player. But each reference on the character sheet to the rule book is 1) a place where PC options are limited, and 2) a rule that the GM is supposed to follow, in her role as rules-enforcer.If so, I withdraw my statement and have to consider the question harder, though my instinct is "no". It might not be what a particular game is trying for in some cases, but detailed character definition is not intrinsically oppressive.
To continue with Numenera as an example, there are a lot of blank spaces where PCs can write in their skills. There isn't a fixed list of what the PCs can and can't use as skills (but there is a suggested list). But the character sheet also has a line for your character class, which is the game's/GM's way of saying, "you'll have abilities from only this list, and other characters will have some limited ability to be able to pigeonhole who you are."