If you strip away the application as a cryptocurrency, blockchain is just another hammer looking for a nail. Heck, even as a currency you're right in that it's an overly-complex hammer for a nail that already has a dozen hammers.

I agree though that further discussion would be necessary to find that nail for blockchain, but the elephant in the room (Bitcoin) has people who are personally and financially invested, leading to incessant noise being constantly generated around anything related to blockchain.