>>What terrible things will happen if I know that someone is pregnant or having problems with a pregnancy?
It's not about terrible things according to your judgment. It's about another person's expectations of privacy. In the absence of criminality or warrant,
She should have the chance to decide whether you get to browse her medical history.
Until then, it's none of your business. These social norms aren't just quaint ideas dating back to the Founding Fathers, it matters in real life- e.g. if there's no expectation of privacy then patients daren't be completely honest with physicians. That helps nobody.
>>A lot more terrible things might happen if I don't know that/
Are you talking about a woman's pregnancy records, or those 30,000 emails HRC destroyed (some of which we now know were classified) on her insecure/illegal email server, citing privacy?
Sorry, couldn't resist. ;-)
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1