To be clear, the post-9/11 AUMF is "specific" to people affiliated with the perpetrators of 9/11. Obviously a nexus can be drawn between a gigantic array of people to the perpetrators of 9/11, and this feature has been abused for decades now, but the Venezuelan situation clearly does not actually (or even allegedly) have any nexus whatsoever to 9/11 and so is clearly not authorized by the 2001 AUMF.

Sure, it wouldn't hold up in any reasonable court, but all they really need is to give congress some excuse to not intervene and pretending this falls under the 9/11 AUMF is good enough. And once the U.S. is at war with Venezuela not even a court order from the supreme court is going to be able to reverse that.