What we need to keep in mind in topic of NFTs (or by extension tokens) is that there has never been any connection between the token and the underlying object whatsoever.
then it's strange that people think such a connection exists. which is obviously why they are buying.
For example I could sell you a pen and store a string mentioning "your name and the name of the pen" in blockchain as a NFT showing I sold you that pen. Whether I deliver the pen or if the pen exists at all doesn't prevent my ability to create that NFT and selling it for real money!
Not only that but it then becomes the buyer's responsibility to get to store the NFT artwork somewhere. Hopefully they store it somewhere that doesn't cause them to lose the artwork by having their account deleted due to inactivity or some other issue.
Forever is a long time...