The idea is that there untold trillions worth of existing infrastructure and tools that are designed to be operated by a humanoid, so the hope is that by designing it close to a human form it will be able to perform task in an environment designed for human without having to design a different robot for each task.

Basically the idea is to create a robot that is good enough at doing a lot of things instead of one that is super efficient at one thing like the ones we use in industry right now.

There are a lot of use cases, but they all assume the robots reach a certain level of precision, speed and adaptability, which we are still far from.