I think the bull, standing alone, is reflective of a bygone era. Maybe some folks want to go back. I certainly never really got the meaning, it was just a bull in a public space. It could have been an elk, an explorer, or something abstract. To me, the girl improved the bull - and the other way around. The bull improves the girl.
I don't think it matters what the artists intent was. The public's interpretation changes, and if he'd really like, he can ask for a plaque describing his original intent.
So this art is advertisement. It isn't like we don't look back and marvel at the glory of old movie posters or anything... Those were advertisements. It doesn't matter if it started as an advert.
I'd have been offended if they did shitty art, but in this case, they took care and did an actual piece.
I don't think it matters what the artists intent was. The public's interpretation changes, and if he'd really like, he can ask for a plaque describing his original intent.