We can all be very American and individualistic about this. You think demographic has no effect? What about being a minority? We can self-adjust to a certain degree, but I don't think anyone could totally free ourselves from our demographic data.
Point is, regardless, it should not define or confine you. I am not defined by my race, sex, age, etc. It's kind of like happiness. We are most free when we come to realize that a lot about happiness is a choice; same thing with joy, only moreso.
If people can be strong enough not to be defined by their tragedies or say physical and other kinds of limitations, they can choose not to be defined by basic demographics. They are there, kind of like your address and telephone number.
Much about demongraphics is all about holding the zeroes and decimal places.
To be defined by demographics is like seeing ourselves as though we were merely two-dimensional. It's like music without various rhythms and harmonies and other artfully weaved variations within the whole piece.
Stay innocent in the light of life while avoiding ignorance of its realities.
"To see a world in a grain of sand,
And a heaven in a wild flower,
Hold infinity in the palm of your hand,
And eternity in an hour."
--William Blake, Auguries of Innocence