> unless you assert ownership entitles you to additional legal rights beyond what the token convey
This is precisely the idea to a certain extent. The ledger serves as proof of ownership which then allows access to entitlements dictated by that ownership. This being done in a digital first way is another aspect as well (although not really conceptually mind blowing to me personally).
> how the hell is that different from the same thing with no crypto involved?
This goes back to what I said earlier about the characteristics of the underlying network driving the value. The differences can be in things like the peer-to-peer nature or the decentralized infrastructure which provides a degree of censorship resistance or improved accessibility.
We're at the point where credible evidence of the value added by these characteristics is still being explored. You can certainly make some level of argument as to why the decentralized nature of these protocols is better than the traditional alternative, but even I'll admit its difficult to parse through the noise of speculation and hype for the arguments that may be worth a damn.
The idea of distributing control, responsibility, costs, and other aspects of operating a system away from singular points of failure is an idea that seems worth investigating and to me this is what blockchain is doing. NFTs are a different flavor of exploration then that of cryptocurrencies.