Don‘t act as if you‘d have listened to me if I had dressed it up in pretty words for you, plenty of journalists have done that already anyway. I‘ll spew my opinions as long as I still can cause believe it or not, I also care about this platform, as I see it as the last ditch effort at having a corporate free space and an online community which isn‘t entirely focused on selling us and selling things to us.
Well, blood type can be set under Health in iOS, so they‘ll probably know at least that since they ask for Health & Fitness info.