[The Philosopher]

But if it is a birthright, shouldn't I be able to use it without spending a feast on it...much like elves cab use longswords?

:-)

(That and I can't. I works have had to level very differently to make room for the exotic weapon proficiency)

I dare say the chances are slim to none-exsisting for this to happen, as then similar arguments could be made for all the races.

Most every race has the appropriate starting feats, even the subraces.

I don't think it's at all a bad request to make or consider, though I imagine it would be technically difficult. Involve the creation of a new feat specifically for the dwarves' racial weapon proficiencies.