First & foremost I really need to emphasise that, despite the misleading article title, this was not a false positive. Google flagged this domain for legitimate reasons.
I think there's likely a conversation to be had about messaging - Chrome's warning page seems a little scarier than it should be, Firefox's is more measured in its messaging. But in terms of the API service Google are providing here this is absolutely not a false positive.
The rest of your comment seems to be an analoy about people not being responsible for protecting their home or something, I'm not quite sure. If you leave your apartment unlocked when you go out & a thief steals your housemate's laptop, is your housemate required to exclusively focus on the thief or should they be permitted to request you to be more diligent about locking doors?