This is going to really depend on the state, but no most do not require any appliances be provided. California does not require a fridge to consider the property “livable” so I doubt not providing a washer and dryer would make a rental “unlivable” in most US states.
OK but that advice was clearly meant for people like OOP who haven’t been in a relationship as the post implies. If you have been in a relationship and are just in a slump then the shower advice was pretty clearly not meant for you? Not everything is meant for you.
Honestly if the energy your putting out in this comment section is the energy your approaching people with then that might be your problem.