<The bottom line, as the author suggests, is that the generalization is established, but some exceptions have come to be common in use.>
The exceptions mentioned at that site refer only to those where time is involved.
"possession does not belong only to people and places, but also to time."
Which would put all of these out in the cold:
See the dog? Put its dinner in its bowl.
Just look at the leaf's colour.
I'll meet you in the hotel's doorway.
The departure lounge is in the terminal's lower level.
<Personally, I don't think the point is worth a great deal of debate. >
Are you then happy for folks at that website to proliferate such "rules"?