And again, while that's an IDEA, it just loses the point of what most people wants to see in a "NTR story". If Suguha was the main character, the entire plot of her having been blackmailed, fucked and such wouldn't really work at all because it would lose what most people want to see XP Your last point is valid though, it would 100% work if Kirito was the sexually frustrated one, especially because Canonically Kirito and Asuna just can't meet and fuck every other week like Fujino made it seem in his NTR-verse, they live SO far apart that the only reason they still see each other regularly IRL post-SAO is because of school and why we basically only see them having like ONE date IRL alone by themselves in the entirety of the series, even counting side-content that never made it to the anime
Meanwhile, Suguha like, literally lives next door to his room, has a better body, and has a national-level kendoka's stamina XD I mentioned it in the past, but it's a shame how little to nonexistent Reverse NTR content exists of SAO because there is a lot of potential for it, especially with how overly perfect KiriSuna's relationship is portrayed and the other girls' silent acceptance of it becomes (Extra so with Sugu living in the same house as Kazuto). I think I only ever saw TWO doujins that were legit 100% reverse NTR, one of Lisbeth at that funnily enough and the other of Leafa in VR.
Almost everyone just wants to see Asuna getting corrupted and fucked/raped and turned into a slut for someone else's dick, while also dedicating no less than a quarter of the work to point out how terrible and inferior Kirito was at sex with the current NTR-man in comparison, sadly, which after like 10 years has gotten beyond stale IMO (And why I think the attempts to 'NTR' the girls beyond Asuna in any kinda SAO work always fall flat and seem more overly focused on making sure to fully ruin Kirito's life all around than the girls actually getting corrupted).
I mean, sadly that's what all Fujino's works end up being, one way or another. Even this one while he's actually dragging the writing to make it last longer (Which ironically has made it feel a lot more unrealistic in other aspects despite giving him way more time to flesh out the world and characters) is clearly aimed to turning the girls into complete sluts in the end, like Kyouko really is whenever she's alone with Inoda despite her words. The only reason they didn't become insta-sluts after being exposed to his dick once even in their attitudes outside of sex is because Fujino wanted to try for a longer and more complex narrative, but it's clear it will happen for the 'main Inoda girls' in the end. Which is also why Suguha's sudden change in plot-focus was both so unexpected and interesting, as it's something Fujino never quite has tried before, but make no mistake, at it's core it IS the same: Suguha was acting like a full-on slut during that 'AV' she made in VR as Leafa with Hebishima. Sure, the 'fresh take' is that she was only doing so and out-fucking him outright because she was fantasizing she was doing it with Kirito and he was actually feeling annoyed at that script, but the 'Fujino TM Complete Slut Attitude' was clearly there, it was just the focus of the character that changed, and the fact that she's the one 'taking the lead' compared to the man because Kirito here is still the 'victim', in the end XD