In your third reason you said, as robots replace human jobs, the human job field will be wider. Well jobs only human can do will increase, but can this solve the unemployment? There are alot of people who got unemployed because of the robots. The number of unemployed  would be more than the jobs that had increased. Also, nowadays even  without the unemployed people, getting a job is really hard. No matter how much the job increases, what a person can do instead of a robot is very limited and will not solve the unemployment phenomenon.