What exact benefits do you mean? I think technological progress has freed women to do other things than, say washing clothes and other household chores. That

What exact benefits do you mean? I think technological progress has freed women to do other things than, say washing clothes and other household chores. That doing other things can of course benefit society, if they so chose. A washing machine saving 16 hours of labor per week can bring society a benefit of 16 work hours per week. As for childcare, I am not sure I agree that organizing childcare so that fewer people can take care of the children is necessarily a benefit. It can be, but there seems to be a limit, too. For example few people would say "one person is enough to take care of 100 toddlers", which would free 99 people (mothers, mostly) to do other things than childcare. Also, if we think in terms of "benefits to society", wouldn't there be other worthwhile targets? For example, what if instead of watching TV, people would do something useful for society? It would be a huge net benefit - so maybe we should outlaw TVs? Meaning we neglect that people may have children because they like having them, not because they want to provide a service to society.