I think he mentioned Brexit because it's an example of too many voices getting lost/ignored in the 'noise' of democracy i.e a democracy needs to represent many

I think he mentioned Brexit because it's an example of too many voices getting lost/ignored in the 'noise' of democracy i.e a democracy needs to represent many complex issues. In the case of Brexit, many votes were cast, each vote complex in it's own right, on a binary referendum that has far reaching consequences. My take from what he's saying is that the world moves far to fast, and is far to complex for the current democratic model we hold dear to function properly for all.