The account was re-broadcasting publicly available information. Anyone who wanted to harm Musk would easily be able to find this information themselves without the twitter account.
True, but the account significantly lowers the bar to finding that information, making it much more likely someone who wishes to do harm could act on it.
Seems to me that a lot of the people Elon has targeted with the so-called "Twitter Files" would say they were making the same type of situational harm-reducing judgment call.