I think this might be a (relatively) rare strategy error for Facebook. If the success of Snapchat, LinkedIn, and also the separate WhatsApp/Instagram properties proves anything, it's that there are very different faces of ourselves that we show to the professional world, to our friends, to partners, and to the world at large. If I was facebook, I would very explicitly announce this as a spin out project, under a diff…
We have real numbers about Facebook and they no more jibe with your anecdotal experience than all of the geek rage about Uber, Amazon, or that people care about “openness” and the “right to repair”.