I think the concerns are real. And I addressed some of what you are saying in a reply to the other comment. But I think the concerning difference in how you see the technology and how I see is due to the word "cryptocurrency". In seeing blockchain as only addressing payment or, worse, being an actual currency. Ethereum and other "smart contract" platforms are basically immutable virtual machines and people are coming up with novel ways to use it. Payments and currency narrative just sort of stuck. As I repeat often in these conversations my, by far, favorite project in recent times has been the Baseline Protocol which uses blockchain not for payment but for interbusiness communication. I posted some links of examples of it's use in my other reply: https://news.ycombinator.com/item?id=24313941