Agreed. This is so obvious that I don’t know why it even makes sense to discuss, unless the person entering has some health issue. Even in that case, they have to ask the house owner or renter whether they can keep their shoes on inside.
Since it is their house, they, and only they, get to decide the rules about shoes allowed inside or not.
One party is entering another party's home. If you're not comfortable with rules inside that home, then don't enter that home.
100% agree that whether your own home is shoeless or not is a personal and cultural preference and decision. More power to you. But if I am entering your home, then your rules prevail.