That's not really accurate though. Only in a perfect, unhackable world would you not have to trust anyone. People have their local wallets attacked and stolen through an incredibly diverse set of attacks, people fell for "mental wallet" concepts that were then easily stolen, and people have lost an enormous amount of value by trusting storage mechanisms and memory for passwords and wallets. Then on the flipside at least what, 80% of exchanges now have had compromises? Do you think this technology has really moved the bar forward around trust as a concept?