voice is probably the worst human -> compute interface we have.

Human speech evolved with biological constraints and through neurological adaptions to emit and understand the nonlinear output that has lexically fuzzy areas to the untrained ear. So I think it's a rather "lossy" analog to digital conversion because the computer is simulating understanding of a form of information transfer that it itself is not constrained by (digital systems don't have vocal cords and could transmit anything).

You could say that about any form of human communication at all.

Does every other form of human communication have an analog in digital systems that has both the capability to be "better" while also putting a lot of resources into modeling the relatively nonlinear human version?