It seems like a reach but I've thought this same thing lol. Thought I was crazy for thinking it, so glad I'm not the only one. Wasn't it revealed a couple pages back that Jin and Tae though not directly related are part of the same bloodline? It would make sense. Jin definitely seems to be the only one to not "cater" to Tae.
This quote was heavily mistranslated. The whole "it's not specific to a boy or a girl" thing people refer to a lot was wrong. He never mentioned gender. He said he doesn't care about looks, just personality and vibe. I'm not saying this is what you said, I'm just clearing up the misunderstanding because it's one I see a lot.
And this I think they are also really close. That's why Vee cried before when he and J1n argued