Then I guess I am too much of a dreamer/revolutionary or plain stupid, because the fact that nobility’s status quo is so that it can fuck over both commoners and the royal family drives me crazy.
Bc, iirc, the royal family can’t adopt someone that nobles won’t like/accept
And again, the fact that they refuse magicology because only them can use magic and it would make commoners less dependent to them is insane
Probably (and luckly for them, i guess), things go way too well in the kingdom, because if I were a commoner and hear that nobles are against me having an easier daily life, I’d be pissed (I don’t want to insist bc I read too many isekai/fantasy with magical modern house stuff, but iirc, besides magical weapons, wasn’t Anis thinking of things like stoves and refrigerators?)
I think it just comes down to the established perspectives of that world and what people think is possible. And unfortunately for Anis, even though she's not from that world and has an outsider's view, she's treated as beneath contempt by the nobility, and strong-arming her way into changing everything as queen would only incite them to hostile action, which would risk tons of collateral damage to both the lives of people and the infrastructure/well-being of the nation as a whole.
And they don't exist in a vacuum - if their nation is seen as weak/faltering by outside forces and interests, that poses an additional risk to the nation and its people of invaders, both in terms of military but also political/economical, that could cause even more harm to the commoner folk.
As poweful as Anis' artifice is, and as strong as Euphie is in magic, they'd still just be two people who wouldn't have any backing from anyone with actual power, magical or political--even if they had the common folk on their side, that really doesn't mean much in the face of a hostile nobility with tons of economic, political, social, and magical firepower at their backs.
And there's every chance even the current royalty would try and quash her efforts in the name of maintaining the status quo.
There's just no good option in-universe for going that route, for her. At best, a long-term plan of pushing reforms through faction-building would be possible, but if she became queen Anis would be reduced to a baby factory to produce an heir, and would be sidelined on day one to whomever the nobility picked as her husband/king consort, and she'd be denied even the chance to start making headway in that direction.
She's truly in a fucked if you do, fucked if you don't situation. I don't know if that was the intent of the author, but that's how her entire story has felt to me--and everything she's tried to overcome the limitations and obstacles put in her way have been thwarted, including by her supposed allies and loved ones.