Explanation 1:

Lauren Sanchez(bezos' new girfiend) along with her brother Michael(who is also her agent), leaked the story to force Bezos to divorce his wife and get along with her.

Explanation 2:

The crown prince of Saudi Arabia personally sent a trojan file, downloaded all the data, distributed it through a gossip rag he happens to be friends with, for some kind of revenge/message

I get why Bezos has to go with explanation 2 because explanation 1 would indicate the girl he wants to have sex with or her brother is manipulative. I dont see why the rest of us have to go along with this. Even this anonymous source says he has "high confidence" not anywhere near certainty.