Honestly were does the idea that Uchiha's can't be jinchurki come from? They are descended from the sage, and have extremely powerful chakra when compared to normal people. Anyone can become a Jinchuriki, provided they have a good enough seal. There will be a higher chance of success provided they have strong enough chakra to suppress the Bijuu, and considering Uchiha are hyped for having the most powerful chakra, and they can suppress Bijuu, the very idea that they can't become hosts is ludicrous.