Hey I'm Kayla, don't be a stranger.
the “you live with your parents” insult is really flaccid because a metric shitton of cultures don’t see “leave the house forever” as some grandiose moment of liberation that’s so important to the development of a person that it has to happen as fast as possible. until i came to the USA i didn’t know a single person who was pressured by their parents to leave the house because they’re “too old to stay there” or whatever. in puerto rico it is really common to stay with your parents until they and you are both stable enough that you can leave. whaddaya know, there are cultures that don’t place a stigma on being poor or wanting to care for your family or needing your family to care for you for some other reason.
One of my favourite things about Harry Potter is that Harry is such an unreliable narrator, not because he’s lying, but because he was so oblivious, just about anything could be going on under his nose and he wouldn’t even notice. It’s great because it supports basically every headcanon. Like, no, Harry would not have noticed if Sirius and Remus were dating, I know he’s The Chosen One but he’s about as perspective as a pile of bricks.