You're not catching on. It's not the trust in the technology, it's the trust between people. Consider business dealings between entities that do not have high trust - everything becomes mediated through lawyers and nothing happens without a contract. Slow and expensive. Handshake deals and promises kept move things along a lot faster and without the expense of hammering out legal arrangements.

LLM leads to distrust between people. From TFA, That concept is Trust - It underpins everything about how a group of engineers function and interact with each other in all technical contexts. When you discuss a project architecture you are trusting your team has experience and viewpoints to back up their assertions.