Washing machines can’t do anything humans do, they just remove labour. Trucks don’t do anything longboats can’t, it just need less labour and time/effort to build roads rather than canals. Computers can’t calculate anything humans can’t dry run by hand etc.
Everything in reality is about reducing time/effort/material/cost or achieving more with less resource.
What stops us from doing any specific thing is always allocation of resources - there's finite amount of time/effort/material/labor available, and past trivial amounts we need more and more people to agree on some allocation. Reduction of time/effort/material/labor costs of any thing is what moves it closer from "infeasible" to "feasible" for us to do. But again, short of violating laws of physics, it was never "impossible".
What I mean is that "can be done by humans" is ill defined. Are you allowed to use pencil and paper? That's not part of your body? Do you have to be strapped into a coffin for it to count as human-done? How about wheels, sticks and stones? Allowed to use those tools? How about an abacus? Or is electricity the line to draw?