Blockchain is a fractional reserve system which can be used as a payment layer. That's it. The whole point of blockchain tech is to create hype and incentivise collaboration towards a shared financially beneficial goal.
Saying that blockchain has no use cases is like saying that money has no use cases. It incentivizes, it corrupts, it buys loyalties, it buys positive news coverage - These are the most important use cases of all and blockchain is great at that. Potential value is real value, even speculative value is real value.
People should not diregard the benefits of Blockchain any more than they should disregard the benefits of VC money. They're both mechanisms of mass collaborative incentivization and corruption.
The only way to beat corruption is by democratizing it so that anyone can do it.