You're basing an entire alternate reality off one outcome; what about the one where your startup succeeded and ended up costing google tens of millions?
The startup where I worked was completely unrelated to the idea that would have saved G+.
I'm saying that, had that startup succeeded and had I ended up at Google around the same time, I would have had the credibility to actually roll up my sleeves, push a few idiots out of the way, and save those tens of millions of dollars. But I didn't have that credibility, at least not then, so I had to sit back and watch as enormous amounts of value were incinerated before my eyes.