It is a slightly odd addition. I don’t really understand the gameplay point of it. In real life I certainly don't expect guests to start cleaning and cooking; but it is not necessary to make it such an inappropriate behaviour as it is in the game, which just leads to misunderstandings between player and game. I had a save testing SE, and my sim was visiting their lover wanting to cook something for them, which they got yelled at, and a 'hurt' sentiment for, that took days to go away. It’s just cooking, what is the big deal?
Sims come visit eachother all the time, and use the computer and never leave on their own, I think that could warrant a 'guest being rude' moodlet instead. But there is no gameplay attached to it, nothing for the player to do or make about it, so it could just be removed completely.
Edit: TS3 has the same behaviour, of your sims not being allowed to do certain things in other sims houses. But I cannot but help to wonder what lifestyle and culture this is to represent, and why it is made into a feature, with no apparent gameplay reason attached to it. It must have seemed completely natural to someone; but in my culture and personal experience, having guests over is pleasant, and whether I am the one who fixes everything, or if we all do it together, it makes no difference. And for close relations, relatives, and especially those of the younger generation, more are allowed. I have met some interesting people in US that I when thinking about it could probably project some smelly opinions on of 'their house, their fortress'; but why this is incorporated into a cutesy game I have harder to relate to.
I think for gameplay, to make it worth while to buy the Reward Store trait Always Welcome, perhaps actions like upgrading appliances could be disallowed by default; but for children and lovers to not have access to commodities is just stingy and the host is the one being rude, really.
