You reverse it: why did the auctor decide to make whom they're fighting over a milquetoast, boring man? — the answer is of course to allow for maximum self-insertion.
This is why I liked Aki-Sora by the same auctor more, for there it was obvious why everyone was lusting after Sora: he was an exceptionally cute genetic lottery winner.
why are there always trucks driving way too fast in japanese manga. What's their obsession with Truck-kun. Just let him be and let him isekai people in peace.