The truth of life... it isn't talent that wins, it is the unnamed countless nobodies that build every single step with blood, sweat, and tears.
Talent does open possibilities... quick learning, unexpected ideas, new ways, all of those need an uncommon insight... but a life dedicated to making that way brings equally unquestionable strength.
Every "stone" that Jinsuke piled is something he purposely chose, he knows and understands every one of them, their weight, their form, their contours... each detail a mark ingrained upon his soul, they are a mighty pillar.
I don't want to mean that pure talent is bad, that is stupid... but Inshun doesn't understand the core of his talent, he simply trusts it will lead him, but as much as that gives strength... it is fragile too, it is one misstep to a fall that may not have return.