The uchiha simply do not poses the strong body to house kurama like ashura's descendants the senju and uzumaki especially the uzumakis do. Kurama's hatred with eat through them in a matter of days and be free to wreck havoc.
They easily have the power to control the Bijuu but once the Bijuu is extracted out of the Uchihas they die period. Only Uzumaki/Senju DNA are the biggest reserves for logetivity and strength to be able to supress the Bijuu.
Tobi stated that Uchiha's powerful chakra is proof of "his" lifeforce which is an indication that powerful chakras are connected to having a high lifeforce, so while the Uchiha do not possess Hagoromo's powerful lifeforce, they still possess a powerful life force needed to house a Bijuu, especially an Indra Transmigrant who possesses even stronger chakras.
So in the other thread, I saw people saying the Uchiha cannot house kurama. Or that Uzumaki/senju body is needed.
This is simply not true.
Reason for sealing it in Kushina
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She had special abilities(even among her clan) that could suppress kurama. I don't have to elaborate. She neggs kurama laughable diff with those chains.
But note the reason, she had the ability to suppress kurama.
Reason for sealing it in Naruto
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Minato had faith his son could control kurama. Took 16 years but he got the hang of it.
I see nowhere that Uzumaki/senju body is required. Ability to supress kurama is obviously more attractive but as with Naruto's case it is not required.
ie, an Uchiha with sharingan would supress Kurama laughable diff.
Obvious reason Uchiha were not given kurama is obvious. Why would you give the most powerful tailed beast to the most powerful clan you feared. If there was a coup they would slaughter everybody.
Really, they didn't need a jinchuuriki for kurama. If the Uchiha were on good terms with the rest of konoha, they'd keep kurama in a cage under sharingan genjutsu from like shisui or someone else.