When a general-purpose robot (aka "something that looks like a human") is refined and improved for a particular task, it won't look like a robot anymore. Therefore, "robots" will never be good at anything, because once they're good, they're no longer robots. (e.g. dish washers, washing machine, coffee makers, laser cutters, CNC machines, etc.)
It assumes that the task is best served by non-humanoid forms.
While that might be true for a laser cutter or a washing machine, there are lots of tasks that in order to be "refined and improved" for them, it should absolutely look like a human.
An obvious example would be a sex-partner robot. Generally any kind of robot that serves humans and we want them to have better empathy towards it (e.g a robot to keep companion to the sick and the elderly). The same holds for robots that are to be used as spies, e.g to infiltrate some human community.
Robots that could be used to play competitive sports for spectators. Robots that do stunt-doubling of actors or perform themselves.
Also, if we want a robot to serve as a "personal assistant" (e.g a butler) the human form is very flexible (and it's flexibility and performance would be increased by the robot's extra capabilities, like more "muscle" power and speed, finer vision, etc).
Such a form will be able to cook, restock the fridge, massage our back, play tennis, take the dog for a walk, clean the house, play poker, help us move, throw out the garbage etc. If you can have something like that, why use a specialized machine for each (for some of those actions, a dedicated machine would provide a luck-luster experience anyway).
