worried about the s4 'mistress' plot

so a leaked audition script from s4 has been released, which is basically the scene from benedict and sophie's book where benedict asks sophie to be his mistress because 'he can't marry her' and they've already had sex. she obviously refuses.

now i absolutely HATED this scene in the book, and their relationship because of it. the power dynamic was hard to read, and his pure toxicity was just horrible.

the thing is, i'm seeing so many benophie stans CELEBRATING this apparent confirmation that the mistress plot is gonna be in s4. i mean, i'm mostly a kanthony/polin stan so let me know if i'm off-base here but this isn't a good thing. honestly, with show benedict's arc about not caring what the ton thinks, i don't even think it's necessary? but they haven't known what to do with this man since s1.

even with show benedict's personality, and if they make the conversation less toxic, the imbalanced power dynamic that defines the offer, the inherent sexism/objectification and disrespect of keeping a 'mistress' you claim to love, and having sex with a woman you have no intention of marrying, putting her at risk of an illegitimate pregnancy, it's just icky on so many levels. keeping in mind, sophie is now a woman of colour. i already fear there'll be a 'white saviour complex' element in s4 (that everyone will praise anyway because ITS BENEDICT AND WE LOVE HIM) but, as a poc, the rich white guy and poor woc he wants to make a mistress of is going to be so much harder to stomach. no matter which way you turn it.

anyway i hope it's not true. if it is, i know people will defend benedict anyway because he could commit murder but yeah please let me know why this is cause for celebration, because i was praying they'd keep this plot out?

edit: I know a lot of people are saying it's book accurate and central to the plot but...is it? even without the offer, there's a lot of drama there (and different offers that can be made). I mean kanthony were forced to marry in the books, and polin never had a student teacher thing so I don't think the writers particularly care about book accuracy. the S3 episode titled romancing Mr bridgerton literally had Mr bridgerton in it for like six minutes total so