This implies that the general population cares to know who is swimming naked. The post truth era is the very idea that the general public no longer cares about

This implies that the general population cares to know who is swimming naked. The post truth era is the very idea that the general public no longer cares about truth. PG is not embracing reality if he frames this around Warren Buffet's quote. Basically PG is like "hey look at all those naked folks there!!" not knowing that he's at a nudist beach.