Board Thread:Episode Discussions/@comment-1181222-20171213112025/@comment-1458758-20171215065525

Gagua2028 wrote: Ninjustsu is something which ninja have an affinity since childhood. It's not something which can be incorporated in someone only because they wish to do so. They need to have a natural affinity towards it.

Ninjustsu requires a specialized set of skills which everybody doesn't have.

Besides I think they made Rock lee a jonin considering his sheer strength in taijutsu can take several enemies even with advanced ninjustsu abilities.

Also who the heck is Metal's real mother then?!

Okay, couple of things. Guy had no affinity for Ninjutsu in childhood, we saw that in the flashbacks with him and his dad etc. But we know as an adult, he can use skills that are definitely ninjutsu, such as summoning. So someone lacking affinity early on, does not mean they cannot later overcome it. The fact that Lee can use the Eight Gates means he possesses Chakra, the absolute basic requirement to be a ninja, so his ability to not use Ninjutsu has to be based not on a hardline binary of can/can't, but on some other aspect.

It's not that Ninjutsu requires a specialised set of skills, but a specialised set of traits. Having the ability to produce chakra in the body, something that humans didn't originally do until Kagura came along and things took off from there.

I don't think they would have made Lee a jounin over that. That is exactly the reason the tokubetsu Jounin rank exists, to denote specialists who possess excellent skills in one area, but not necessarily all aspects. I go back to Might Dai who could solo against the Seven Swordsmen of the Mist and was still a genin, similarly so for Naruto and Sasuke whose skills are easily on the level of the Kage, but have no stated rank achieved beyond Genin. They don't automatically give people ranks based on their power, it's literally a qualification they earn. See Shino, who in the Boruto anime has been called Jounin level, but has not recieved any qualification beyond Chunin. So in short, Lee must have learned the skills he needed to succeed at becoming a Jounin.

As for Metal and his mother, we don't know yet. We've been given no information on his family beyond Lee being his dad, and the fact that Lee found a person who could keep up with him at all is surprising.