Didn’t read entirely but it looks like collaborative filtering based on preferences. That’s fine. When I saw the headline I thought it might be a personalized medicine model that predicted side effects of different hormonal treatments using whatever omics. That would be a really impactful area to do some data science. There’s probably a lot of low hanging fruit, and there’s really no good resources as far as I can tell to help women choose which contraceptives will negatively impact them the least.