The "I have nothing to hide" argument doesn't work for security, and it doesn't work for health care records either.

You might not have anything to hide now, but you might in the future. Someone you are closest to gets murdered or into a horrific violent accident right in front of you. Despite your best efforts this gives you crippling PTSD and you are committed involuntarily for a 72 hour hold. Now your future employer (legally or not) runs a quick records check and sees you have mental health concerns and really doesn't care about the context. Why roll the dice? Go with the candidate who was in a close 2nd and already a coin flip who doesn't have such a thing in their history.

Plenty of other scenarios that can happen to anyone even if they live the most perfect boring life imaginable and never do anything interesting ever. Plenty more for folks who step off the reservation of "acceptable social/corporate behavior" even a little bit.

Plus, if you want to protect folks like in your example of having an abortion on their record - you need to vehemently defend their right as a boring person yourself as that's the only way such individuals will ever be protected. It's like herd immunity but for privacy.

It's not about the people who have nothing to hide. It's about the people who do.