Or they'd need to find a way to break SHA256. That's a risk you don't hear much about.
I think it's fairly destructive to just discount new technology based on feeling. It really is a fun technology to learn and the more minds like we see on HN that research the topic, the more likelihood we will have in expanding the usefulness and security of blockchain use-cases.
Bitcoin promised to be a decentralized alternative to fiat currency and failed when it couldn’t scale to be even a tiny fraction of the global transaction. When people tried to improve on the original proposal they also failed at the very same thing while inventing new problems in the mean time. As of yet the only realized potentials of the technology are scams (which were never promised—at least to my knowledge).
Compared to Web 1.0 I think it is pretty safe for you to discount the technology based on a history of scams and failure to realize promised potentials.