I disagree with the three supporting details which you brought to support your argument.

First of all, you said that people who lost their work will become unhealthy due to the less movement or activity. But do you think that even the office workers who work just on their chairs will move less and become unhealthy if they quit their jobs? Not really. Work is not an exercise. In other words, movement or activity is not the purpose of the work. Therefore, there is an logical error that not doing 'work' will lead to poor health. Also, you said that if robots replace human works, people will become lazy because they have nothing to do. However, if robots do the simple labors instead of humans, people will do more complicated work, not the less work. Therefore, it will not happen that people become lazy because they have nothing to do.

Second, you said that robots can have some errors. However, humans make more mistakes than robots. Robots are modified many times to be perfect, so they will have fewer errors than humans. If there is an error to robots, humans can solve it standing by their side.

Finally, you talked about economic problems such as increasing unemployment and the gap between the rich and the poor. However, this can be solved through 'Robot Tax.' The robot tax is a tax imposed on the economic value which is produced by the robots. By collecting robot taxes, we can re-educate the unemployed and also decrease the gap between the rich and the poor.