Blockchain solves the "how do we keep track of everything?" problem.
We already had databases for that, but OK, blockchain is decentralized.
The much harder problem of "how do we bridge data & reality?" is mostly unsolved, and sometimes especially unsolved when blockchain is involved. (eg. paying via Apple/Google Pay will generally go OK in many stores, but paying via a blockchain-based cryptocurrency not so much...)
We already had databases for that, but OK, blockchain is decentralized.
The much harder problem of "how do we bridge data & reality?" is mostly unsolved, and sometimes especially unsolved when blockchain is involved. (eg. paying via Apple/Google Pay will generally go OK in many stores, but paying via a blockchain-based cryptocurrency not so much...)