If it was marketed to repair shops and such, would you think it's "sleazy"? What if he released it as a way to jailbreak? Data recovery is the other use which comes to mind.
Quite frankly, I think it's a relief to see a few "cracks in the wall" --- that not everyone working for Apple agrees completely with their authoritarian view of security.
Sure, "I forgot my password and want to recover my own data" is a legitimate use of a security flaw, and you might be happy in the short term if you need to use it like that.
That doesn't make it a good thing overall that the flaw exists.
Quite frankly, I think it's a relief to see a few "cracks in the wall" --- that not everyone working for Apple agrees completely with their authoritarian view of security.