Children are a blessing to parents, and parents won't be lonely if they have children living with them, especially if the child already has a job that earns money, which can also help them a bit because the child has an income. So it seems odd that a parent would intentionally demand rent from their child just because they live with them.
My parents collected rent because I started earning. To make me aware that washing my clothes, cooking for me is worth something.
Needless to say that I found a more conveniently priced option.