Epistemically: if it can be so easily vibecoded to rust, why can't it be vibecoded to be reparted? Isn't the great and Almight AI unable to parse and repair Zig

Epistemically: if it can be so easily vibecoded to rust, why can't it be vibecoded to be reparted? Isn't the great and Almight AI unable to parse and repair Zig? Identify it's weak points and route around it?