Yeah, in this situation, using robots instead of human is very effective. It can increase work efficiency and prevent with viruses. And robots can work longer than humans. However for this reasons, the factory will operate in for a longer time. So, environmental pollution will get worse than before. For example, carbon dioxide generated by factories causes global warming, and contaminated waste water pollutes the oceans. In this way, it can be a comfortable world for humans, but it can't be a good world for humans to live in. We must consider the environmental pollution that robots will cause.