They need to learn it…
Be it resolved that the truth of kids doing chores is ‘they need to learn how.’
How do you know that’s true?
-- because all adults need to know
Okay, without referring to all the adults who hire out that work to pros, let’s pretend that’s true: how long would it take an adult to learn to sweep a floor or wash a toilet? Ten minutes? Fifteen if they had to add a lecture on cleaning supplies and tools?
How long do you think the training is for a professional maid to be completely qualified? A week? Three days? Half a day? How is this an argument for eight-year-olds doing the same task even once a month?