Robots can do many things humans cannot do, including:
Chat with our AI personalities
No robots cant use the bathroom they simply have no Bladder so they cant ever have to go
because that they can do work for us that we cant i mean, there are things that are really hard to do in life that we cant so they made robots to do the things and help them.Sometimes to serve them. (people)
pick up small things that we cant
they gather samples and data from planets we cant get to like mars
i really don't think robots will rule the world but i cant tell the future so i guess u will just have to see.