the whole thing with a cleaning fee is either to allow the advertised room price to appear lower (but doesn't airbnb now factor the cleaning fee into the price shown?) or alternatively to make longer stays cheaper because the cleaning fee is not applied for every day).

for example if i spend a several days or longer in a place and instead of washing and reusing dishes as i would at home, i never wash any dishes but use up all the available dishes instead then i would not consider that normal.

dirty dishes also contain leftover food which can rot, or dry up, making it hard to clean, etc, you don't want to leave that stuff out for to long.

bed sheets on the other hand i wouldn't wash unless i am there long enough that i want to reuse them myself. the rest is just keeping things tidy and not leave chaos behind.