If you give someone that privilege then treat them as human. US prefers to hang that privilege upon people and treat them capriciously.
Similar situation is in US work ethic, where CEO is something akin to a feudal lord.
Similar situation is in US work ethic, where CEO is something akin to a feudal lord.
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.