In an ideal world, things will be build to facilitate the trust, we don't have to trust any programmer at all.

The trust in put on the code itself which not one but all of us agreed upon. Today, we don't have the tools to allow people to actually understand it but it doesn't mean that we won't in the future. Abstraction layers will be built.

Of course this is an optimistic speculation. I'm personally not attached to crypto in anyways but I'm excited about innovative opportunities that it enabled.