It's pretty hard to create an alternative physical network. I suggest we just rebrand the web (e.g. OpenWeb), enforce encryption everywhere, utilise existing networks and decentralise the root DNS servers.
What they have shown is that bad lifestyle habits correlate to low cerebral performance. It doesn't come as a surprise that general bad health isn't good for you. It's stupid to point the finger at obesity when it is only an outcome of bad health in general.
I've recently lost over 40kg of body fat and noticed the positive effects of it on my brain. But the reason to it lies within exercise and eating healthier, not within my BMI.