That's really the whole problem - understanding how all of this stuff works requires a master's degree in cryptocurrency. Being smart enough to vet that it's actually implemented the way its proponents claim is even harder.
You can point at some hypothetical future you imagined from the pure crypto first principles, but then I have to trust you. And so, ultimately all of this comes down to trust. Not "mathematical" trust but rather real, human vetting process that require actual work to be done by humans.
The problem then, becomes that regardless of the foundations of your system, if enough bad actors take advantage of the systems inherently confusing nature, then no one will trust the people who are using it for good. And what point is there in a system that is only used for idealistic side-projects and deception?