Oh, I fully support dedicated throwers; I think its funny, cool, and possibly useful in certain situations, or often useful if you are a pro. However, I don't believe that weapon function should be distorted to fit some arbitrary conception of a "class".
I wish that I could take some javelins or axes for my melee builds once in a while, but I'm unwilling to invest in powerthrow. if the difficulty was str based, I would occasionally find it cost-effective to use them. Whether their gold cost is fair right now, I cannot say, but I'd imagine they would be pretty cheap relatively.