It's psychology taken to the extreme. Anyone with that information would know practically everything about you. It's an invasion of privacy.
If used by the government or used en mass by big corporations such as Amazon on more than just their employees it would completely erode every single right to privacy we have.
It has been used by the government since technology gave them the ability to do it. Pretty sure they were exposed spying on people many times and a while ago. Its nothing new. And as for it being an invasion of privacy, you are consenting to it in the interview, meaning you ALLOW THEM TO. If you do not want them to you do not apply. Thats not an invasion of privacy. Besides, if your not commiting crimes, what do you have to hide?
You have to agree, sure. Right now. But eventually this will probably become mandatory or widespread enough that every decently paying job wants to delve as deeply into your private life as possible.
Also are you really using the 'nothing to hide' argument? Jesus fucking Christ.
Ever heard of the saying "Arguing that you don't care about the right to privacy because you have nothing to hide is no different than saying you don't care about free speech because you have nothing to say."?