> I am constantly surprised by this point of view. Blockchain is a solution to a number of problems that were previously unsolvable, yet so much of the discourse is around the idea that decentralised trust doesn't really solve any useful problems.

Those two things aren't mutually exclusive. Blockchain solved some very interesting technical problems, much like a lot of advanced math might do. But as you pointed out, the discourse is around whether or not blockchain solved any useful problems, not just interesting problems.

Like others, I have yet to be convinced of a use case for which blockchain is the best solution (other than cryptocurrencies).