I think you're blinding yourself with the hype. The "blockchain" is nothing more than a merkle tree. We've known about these for a long time. The insight is that by publishing a merkle tree we can show that various actors are following a protocol. This is very valuable. For an example of another application take a look at certificate transparency (not actually a fan of CAs, but it was the most readily available example).
It's interesting that you say that creating a payment processor for transportation fares that is not controlled by a monopoly is pointless. I currently live in a country that has at least 5 payment processors for train fares and it's taken them decades to figure out how to interoperate Even now I still can't use my rail card in Tokyo.
These are real problems. "Computer Science toys" seems like another word for "research" to me. That the research was done by some random guy on the internet with unknown motivations is completely beside the point. Yes, like most people, I could definitely do without the scams. I could definitely do without the "OMG! Blockchain" knee jerk reaction. But would it be too impolite to also complain about the "Blockchain? Pfft!" knee jerk reaction? Lightning is a great example of a useful protocol -- full stop. I don't care if it's implemented on top of Bitcoin or on top of some byzantine 18th century payment exchange based on carrier pigeons. We need more of this stuff, not less.