One of the main points of the article is that the government and the legal system is an effective mechanism of trust. If you're worried someone will squelch on their end of the deal, you write up a contract and thereby get to sue them if they fail to do so.

This is usually where the bitcoin adherents start referring to corruption and the ilk to explain why government can't be trusted. But Schneier has the rebuttal: we know damned well from experience that you can't write bug-free, secure code. Bitcoin requires hidden trust in the programmers of the software, and in the community to move forward on decisions, and history has borne out that this trust is misplaced.

Blockchain isn't trustless, it just replaces trust in a system that is designed to efficiently enforce sanctions against those who violate trust with a system where every participant is responsible for policing trust individually.