This is actually the first time you actually bother to clarify your point, so good on you.
That said, have you forgotten what led to this duel?
https://mangadex.org/chapter/6d15ea55-3cd1-414d-840f-beb17935d337/13
https://mangadex.org/chapter/6d15ea55-3cd1-414d-840f-beb17935d337/14
It's because Shippou wasn't willing to listen that Tomitsuka is basically dueling him.
Tomitsuka's shoving the hard truth in his face first, letting Shippou try out his claims and crushing them.
If you think that was 'cocky' and 'unnecessary' then it seems like you really haven't been paying attention to the story.
I did, did you? There was literally no 'only' in my post.
Since reading comprehension failed you, the whole statement of that part was "bunch of replies saying he's wrong and that this chapter will explain what Tomitsuka's up to."
I was referring to the other replies you got. You know there's others who said you were wrong?
The 'truth' that turns out to be you have very bad memories to have forgotten what led to this duel?
Suuuuuuuuuuuuuure 'everyone' totally agree with you, that's totally why my post had 8 likes while yours...1.
EDIT: forgot this part
I'm pretty sure most people thought your 'cocky' part refers to him asking Tatsuya for a duel, because nobody thought him giving Shippou the ego breaking was anything 'cocky' especially considering how the duel came to be.
So if THAT was what you think as 'cocky' then your take was so stupid nobody even considered it.