Originally Posted by NeoKakarott023
Since Uzimaki's are descendants, they're power can only be watered down compared to the original Senju, or even Hyuuga/Uchiha, which ever one came first. That's a battle I'm not going to breathe on with KYF in the room. One can't equate anything with a pure Senju was my only point. Uchiha's as much as I love them, depend too much on they're doujutsu, and can't tank as much damage as a Senju, and generally need additional shinobi, bijuu, others jutsu's, at least until they arrive at Rinnegan which has happened only once thus far.
Not necessarily, but potentially may have happened that way. If the Byakugan was an offshoot of the doujutsu wielded by the elder son, albeit overall inferior but conferred enough advantages that it was not shot down and eradicated by fellow clansmen or rival clans, the Byakugan would just keep on being passed down. Hell, maybe those who carried the traits for the elder son's doujutsu were just smitten with those born with the Byakugan because it looked sexy or some shit, and they just wanted to make babies with those carrying the expression, or maybe Byakugan has better insight than the elder son's doujutsu, so its effectiveness at long distance outweighed everything else at that point. If that was indeed the case, the environment, relying on far-ranged senses to plan and defend against attacks, played a role in those carrying the Byakugan thriving, and if they thrived in that environment, more Byakugan holders would continue to pass on their genes.