Indeed. A household with a single wage earner will have a lot more free time. Its not just cleaning and cooking, it's paying bills, organising holidays, going shopping, arranging events/parties, socialising with neighbours, taking kids places, birthday cards/presents, keeping up with local council issues to be able to vote sensibly... the list goes on.

Honestly, given where the productivity gains of women in the workforce went (not to the actual workers), we'd probably have a better quality of life if only half the household adults worked.