Then I would imagine anyone else could have found it.

Right, including Sony. AI finding security flaws is very good in general, but one downside is that it will become easier to make "secure" devices that are hostile toward their owners.

Sure, but that wasn't what I was getting at. The guy is complaining about the exploit being disclosed to Sony, but anyone who used the same tools could have found it. It's kind of like complaining that someone has spoilt the ending to a film when it been out for over a year.