I can possess all the bored ape JPEGs. So can anyone else in the world who can right-click or screenshot or download a .zip of them.
Not legally, they aren't. I can take someone else's photo, put it up on OpenSea as a NFT, and it'll go through. I didn't own it. You don't own it. The original photographer still holds every bit of legal ownership, regardless of our possession of JPEG copies of it.
> a nonexclusive, worldwide, royalty free, fully paid up, transferable, sublicensable, perpetual, irrevocable license to copy, display, upload, perform, distribute, store, modify and otherwise use your User Content for any Y Combinator-related purpose in any form, medium or technology now known or later developed
What a particular platform does when it sees that relationship is up to them. If no platform does anything with that data then your NFT does exactly nothing.
According to who?
Not according to the government. "Owning" an NFT doesn't give you any kind of reproduction or copyright rights.