Actually its not , the byakugan has many types of vision , one is the 360 degree detection vision where they detect all attacks within a 50m radius around themself and the other is long range scope vision which they use to gather intel from afar.
The detection vision not only sees but also detects attacks which is why neji was able avoid a multitude of daggers from kido
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This type of detection is similar to wen neji expelled chakra into his blindspot and was able to "detect" the arrow
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Tenten further proves that byakugan can see but also detect attacks within a radius around the user which is different than its ability to see far distances
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So unless hinata can see and "sense" attacks from over 10k away then its different.
Kido never said that his farthest vision is 50m , he said that "he accurately detects all attacks within a 50m radius around himself " , which is the range of his 360 degree detection at the time and the best vision he could use against kido who attacked from all sides.
Scans of neji sayin the farthest he can see is 50m??
1.3 K is lower than 10 k yes but its still higher than 800m which most blindsided fans believed to be his limit and its also obvious that 1.3 k is not his limit unless u think that he guided lee to his tag from 500m away at the very "edge" of his visions limit , which is funny.
So all in all im trying to show u that their max vision was never "confirmed" and is most likely to be close or equal due to kishi's statement in the databook an hinata's statement in the war.
Also how could hinata possible hav better vision than hiashi? are u sayin that there are some hyuga's who are born with vastly enhanced range than others with no need to train at it , which includes hinata along with other nameless hyuga's?
This fact was never stated in manga an i feel that would've obiviously been noted at least once if it was the case.