What Google is trying to do with Google+ is take hold of the information market that resides within social media and use this information in combination with adwords. Google wants to integrate Google+ into all of it's products, starting with Youtube and give all the Google products a uniform experience. I'm flabbergasted that you have a problem with this since this is the main goal for Apple. (I assume that you have Apple products, since you talk in such lengths and positive manner of Siri) Google+ is also not about a social graph, it's about doing social media the right, natural way.
You also don't understand how Adwords works when you talk about Siri. A 'click' is a hit to the page, be it a click, enter, wget, or voice search of Siri. So searches in Google with Siri will earn Google money. Also iOS uses Google Maps as it's map application so Siri uses Google Maps, you just don't see it.
A last inaccuracy: “Don’t try to do something in everything. Rather focus on doing everything in something.” This would be exactly why Google has been stopping so many of it's products.
Next to these points there is a whole lot of stuff that you are simply wrong about.
Edit: changed positivism to a correct use of words