It is a zero sum game but the currency is not money, it is time. Those minutes you save not cooking can be used to do anything else. The thing is, if you ever

It is a zero sum game but the currency is not money, it is time. Those minutes you save not cooking can be used to do anything else. The thing is, if you ever look at the situation from a financial standpoint, you'll always see the same picture: cook for yourself, save say 2000$ a month for 20h of extra work, or work an additional 10h doing your lucrative job and make the same amount back.