自動化された生産により、最終的には人手が不要になります, バルブの場合も同様です, およびその他の生産産業. We will eventually free our hands.
This is actually a good thing in the long run, and there may be worker unemployment in the short term. But in the long run, efficient production capacity will lead to higher social output and building capacity. Thus allowing everyone to be more productive with less work.