Perhaps I'm misunderstanding what you mean when you say, "I disagree on every level except the binary 'someone is trustworthy or they aren't' level." What is it specifically that you disagree with?
You said
There is nothing anyone can do to prove they are trustworthy. Someone can only be proven to be untrustworthy, and that's only after they've scammed someone, not before.
This seems to imply that there's no such thing as partial trust. There are things that anyone can do to partially gain my trust.
Huh? There's nothing to interpret. You're reading way too much into my statement. There is no hidden message to decipher.
Why exactly don't you want to make a bet? With a bet, you tie up no capital and have a positive EV.