Each to their own I guess!
I'm one of those women who have ended up sounding like a medical book since TTC and becoming preggers. It's not that I'm a total worry-wart, it's more that I find it absolutely fascinating.
These things are happening inside my body, all this crazy stuff, and of course they would all happen whether or not I knew anything about them, but knowing makes the process all the more wonderful. Sorry for sounding like an old hippie!
Plus, once I know about certain things, it doesn't worry me when I experience them because I am prepared.
And, a couple of times I've been able to ask my doctor a key question which has been able to clarify something or another, which otherwise I wouldn't have known to ask. Including when he wanted me to have an amniocentesis and I could refuse knowing that there were other options available to me, which we then talked through like equals rather than as patient/doctor.
Personally I wouldn't want my doctor to have complete control over my pregnancy. I respect his medical degree, but when it comes to my baby, I feel the need to have some say in what happens.
So, yeah, that's why I like to be as informed as possible. Maybe it would worry some people more, or maybe some people just aren't interested. Fine - it takes all sorts. So YANBU, just different to some other people