You can certainly see baseball cards (or stamps, Magics cards, whatever) as worthless. The difference being that when you buy a baseball card, (yes a reproducible good, so its value is anybody's guess), you're not buying a link to a baseball card powered by Ethereum, you're buying a tangible product at the very least.
To me the NFT is so intangible as a product that clearly its market is already set to die, the question is who will be holding the bag and who will make millions.
For stocks most people prefer owning an intangible version of it. Very few people want an actual certificate saying they own it.
The value of my baseball card might fluctuate but at least it's existence doesn't depend on the availability of servers outside my control.