From my perspective trust is all about belief. If something can be proven then there is no need for trust.
Can you prove free will exists?
Let’s say you believe people have free will and you loan a friend $60 for a game.
Your friend says they’ll pay you back. You can’t prove that they’ll pay you back because we’re operating under the assumption that they have free will so they could very realistically choose not to.
Do you think your trust in your friend a mental illness? Because I think the majority of people feel that trusting your friends is a sign of good mental and emotional health.
Classic!