Board Thread:Theories and Speculation/@comment-3001903-20160813042916/@comment-25122992-20160813100454

Well, I should at least note that we don't actually know how many Uchiha could've awakened MS after Madara/Izuna generation. So we can't be sure that Obito was the first Uchiha getting MS since Madara/Hashi era. But overall, it's true, although an Uchiha would have a better chance to control a Tailed Beast as its Jinchuriki, their clan was a way too untrustworthy in the eyes of Konoha government to give them that much of power and responsibility.

Besides, I'm not sure if it was directly stated, but it seems like Konoha had a tradition of making only the Uzumaki clan members from the Hidded Whirlpool to Kurama Jinchuriki because of their "special" chakra capable of suppressing the beast.