I get your point, but it's not like a random street of NYC, that place is a major spot of the show, perfectly recognizable, where a structure is built during the shoot. Some ground structures are visible between filming, where the props are removed, and to have been there, many people go there in "pilgrimage".
In a forum I said that in that specific case, where the spot is central and perfectly recognizable in a movie or else, it can be tagged.
It's not different of many overs, like Edoras from The Lord of the Rings in New Zealand for example. It's just a hill where a whole city has been built, and completely removed after the shoot. There's a tourism=attraction spot on it.
I'm not saying you're completely wrong, I wouldn't put a tag for each filming spot of the show, but for that one, according to the few informations I found on forums, it seems to be acceptable. And useful. It is showed in a video where an OSM user lists filming locations of OSM, and many people will be happy to find it on OSM, because it's not that easy to locate.
Even the owner of the area has set a panel on his gate to give informations about it.
What do you think?

Because it has been made for several places used as filming locations. And the osm wiki doesn't talk about that specific case. It's fixed now, not a big deal.

Hi. Well not really indeed. I hesitated between that and just put a point with tourism=attraction. I'll go with the latter.