Your argument doesn't even make sense. The blockchain is just a ledger. A really inefficient one, at that. It has to be inefficient because otherwise it loses all the attributes that make it desirable to certain markets. Take that inefficiency and you lose all that "trustless" "byzantine generals whatever" crap and you are left with git or hell, a real database.

Face it. Blockchain is going nowhere. It was stillborn the day it was created. It's had 10 years and nothing about it has fundamentally changed (as many bitcoin advocates love to point out as if it was a positive thing).

Normal people who say "yeah, blockchain might have a use" are just being polite. They don't want to state the obvious. Beyond its current use case as a magnet for scams, fraud, pump & dumps and get rich quick schemes there is no use for the blockchain at all.