I think you're misunderstanding what I'm trying to say. You think, I have stated passion is enough, and that someone who just goes in and spouts a monologue about their interests without stopping for breath is going to get in.
My actual point is that, it's possible to prep without being passionate, which you have dutifully demonstrated by providing the perfect example. Your daughter read, watched films. Now, for you, it's 'not much', but it's more than what a lot of others do. And it's the exactly the sort of thing that schools who send loads of pupils to Oxbridge every year, advise their cohort to do, in addition to prepping for entrance tests etc.
What Oxbridge are trying to say is that, they don't want people who have been prepped. Their objective, is to get the truly passionate. Who have done all of this because of interest, not because they've been coached. Now if your daughter did do all of that stuff under her own steam, not just because she wanted to apply one could argue that she was somewhat passionate. Not strong enough for your definition of passionate. But she had an interest beyond getting good grades.
At the end of the day if someone is truly good at performing, it will be hard to tell the difference. And that aside, whether any individual gets in depends on the strength of the cohort.
Many people who do 'meet the requirements' don't get in, because there are others better than them. Your daughter might even have been the last person picked, might not have gotten in if someone else was better? Who knows? You think she didn't do much but actually, she did more than others.
As an aside, MFL as a degree is dying, I think you have been on a lot of MFL threads recently where people explain the reasons against choosing it as a degree, arguing against its worth. And you defended it, stating how your Sri Lankan garage owner wondered why she was doing it instead of something practical like Law. Maybe it was another daughter? But if it was this one, you failed to mention that it was at Oxbridge, which immediately puts it in a different category. Any Oxbridge degree makes one valuable to employers, no matter the subject.... the same considerations don't apply even for someone studying it at any other well-regarded institution.