> This is the fundamental problem with NFT's as I see it -- there is fundamentally no way to tie it to a physical object.

There is actually. I can't find any references to it at the moment, but there are certain things that are easy to make but near impossible to clone. For example, particles suspended in epoxy can make for a unique pattern for each item that can be scanned and verified, but getting a duplicate pattern is nearly impossible, and not economically feasible.

The NFTs aren't really needed though, a manufacturer could just have a "scan this item with your phone to see if it's genuine" app and that would be sufficient.