They could have been more accurate 15 months ago. The same thing happened a few years ago in the US when Google converted from TeleAtlas (TomTom) to their own map. They essentially "backtracked" to a public domain source of map data then began their "ground truth" campaign. They owned the content and map from that point, which led to their MapMaker program to improve it. Since MapMaker is not available in Hong Kong yet it leads me to believe that Google has not taken ownership of the data in that area yet. As such, there is nothing for them to change or ask users for input on, as it isn't their data to edit. It could make sense that a POI would have a Google+ profile as the place certainly exists, reviews would be valid, etc., it could just be in the wrong place at this time due to the location data being from others. The Google+ POI profiles could be a "stepping stone" towards Ground Truth.

I think we shouldn't lose site of the fact that Google offers Maps for free. Sometimes, in my opinion, people comment about Maps as if they just paid Google $250 for a GPS.