As a child at that age, my jobs were washing the breakfast pots, setting the table with Dsis, Dsis and I were on drying up duty after dinner, hoovering and dusting lounge once a week, and of course my own room.
I've got to say, the only bit I resented was my room. It wasn't a communal area, and I really didn't see what difference it made to anyone else if my bed wasn't made in the morning or my books/toys were out. I didn't break things, stuck to the house rule of no food in the bedroom, etc, but found the massive dramas over my room OTT, to be honest. If I had scrawled on the walls, or left mugs to grow entire civilisations in there, fair enough. If stuff got broken because I was untidy, fair enough. But none of that was the case, so I guess I was guilty of being nagged about it because I just didn't get the problem.
Would it have been easier if I had just done it? Well, yes, but it was the one bit of the house that was my space. Yes, it was my parents house, but I didn't damage the walls, or break the things they bought me. I just wanted to be comfortable in just one room.
I never had kids, so will always wonder if I would have understood the issue if I had kids, or if my mother and I were simply two different people. Which we still are, 40 years on, my version of tidy still isn't hers, but when she comes round I do my best to ensure she's comfortable in it).
wandered off the point a bit, there, sorry.