What?
Kakashi clearly said that the Uchiha was the top clan, that's not something he thinks happened, it's something that's a fact.
Kakashi says thing that are to his knowledge, he didn't know about the other Uchiha, but he did know about the clans.
And there's still plenty of other scans stating that the Uchiha and Senju were the strongest.
Hyuuga were never part of any law enforcement, only the Uchiha were. What that says is that only the Uchiha were strong enough to keep the other shinobi's in line, since they were superior. Tobirama chose them because they were fit for the job, it was just convenient for him.
1. Uchiha and Senju were considered the strongest of all the clans.
2.
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Hyuuga weren’t on top until the massacre. Not to mention, Kakashi was really scared just for facing someone with the Sharingan in their blood.
3.
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Ok, I may have exaggerated a bit when saying they were all geniuses, but it’s basically the same concept. The eye is what makes them elite. Just look at how much Obito improved as soon as he got the Sharingan.
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Then there’s this saying that they were superior to others in the village, including the Hyuuga.
4.
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The Uchiha were held in high regards, that’s something we can’t say about the Hyuuga.
5. Neji is considered a genius in the Hyuuga, but he pales in comparison to Itachi, a man considered a genius in the Uchiha, what does that tell you about the clans strength as a whole?
6.
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Even the new chapter puts the Sharingan above the Byakugan by saying it was it’s power that Kaguya relied on, not the Byakugans.
Not to mention that the Uchiha were superior shinobi < that includes the Hyuuga.
There's more, but I think this is enough. I don't know why people argue that Hyuuga>Uchiha so much when it's already canon that they're below 3 tomoe. Being strong shouldn't be what makes them great.
They're a great clan man, they're just not the strongest.