Tho if I was staying in someone's house they would come home to dinner cooked and dishes washed up. But I would never ever interfere unasked in the hosts evening routine.
As mentioned before we are different people. What you think is rude I find safe and what I think is rude you find ok. If I need/want help I just ask for it. I always have family and friend over so I'm used to chaos. I'm just trying to explain that if you earn your folks to help then just ask them or give them a job specifically to do.