What are the advantages and disadvantages of replacing labor with machines?

Update:Oct 15,2021
Summary: Benefit: high efficiency, strong intelligence, saving labor cost, avoiding the difficult situation of recruitment and reducing the complexity of labo......
Benefit: high efficiency, strong intelligence, saving labor cost, avoiding the difficult situation of recruitment and reducing the complexity of labor management.
Disadvantages: robot technicians are scarce, but some types of work have no jobs to find, resulting in the temporary detention of some labor forces. The initial investment cost is too high and the risk is high.