There is always a potential that whatever technology we humans develop, it will be used against us.

Kitchen knife can either be used as a tool for making food to sustain life or can be used as a tool in a murder conspiracy.

The purpose of robots are to make sure they work as assistants around the house to help us or conspire with hackers to destroy us.

Another thing is that if robots are used as maids then it will destroy the maid industry of actual human beings working as maid to earn livelihood, if this is made cheap many people may lose their jobs.