And your bank account balance is some meaningless entries in a SQL database
At any rate, to the tokenized stock example, if you are purchasing a tokenized stock represented by a company such as Robinhood, it too is a debt in that the token is exchangeable for the underlying.
This is an even higher level of guarantee than, say, an options contract, in that the reserves are provable. It does, of course, involve trust in the intermediary, just as your bank balance does. But at any rate, this financial technology is an expansion of what isolated databases provide to the market.
If a company chooses to list its stock on a blockchain instead of the NASDAQ, then, sure that could have the same value as a traditional stock assuming it confers the same rights.