Chaos control is right, if your grandmother is a Ootsutsuki and your grandfather a human, you are both a Ootsutsuki and a human even if you don' t have their names.Like in our world people can change their names, they will still be a part of the family trees they came from.You don't get it.
The Uchiha, thanks to Kaguya's Shinju power, have the Sharingan locked in their DNA. They are not Otsutsuki's but humans with small amounts of Otsutsuki blood. Their power does not come from the Otsutsuki clan but the Shinju tree. The Otsutsuki family without the Shinju would lose to the Uchiha clan.
I see what you're trying to say but you're missing what I'm saying fam.