So if a guest overstays their welcome and you kick them out of the house you are treating them as an animal?
We even have laws about this, that's why there's a whole eviction process and it applies to people living with you as much as to normal tenants.
It was never intended as “come here permanently”.
You’re basically expecting something it never promised.
It's like giving a home plumber access to your yard and then you move but he still hang around your yard.
And no, that's not treating them as animals. But you are not exactly a proper host either.