Other posters have rightfully pointed out that the internet is indeed open and free (for the most part), but good luck getting all of your friends to agree to use your new DIY whatsapp clone. Effectively, everyone who doesn't know how to standup their own website is completely at the mercy of these technology companies now.
Furthermore, the channels of communication most people use are now being forced through these tech companies because of recent events. The amount of control sitting under Google at this very moment is sickening.
Seriously think about it. If Google went completely AWOL, how much damage could they do to the world? How much control do they actually have over every Android handset and web user experience? I feel we need to start looking at Google in terms of the worst-case scenario, and then start planning policy around that. There is just too much at stake now.