The author titled his post "50 things I never need to hear at another conference". Presumably he feels he has heard this wisdom often enough to have internalized it.
I dunno, the whole post read as if he was trying to make some kind of point about accepted wisdoms, fashions and memes of the game industry. This one is more of an indisputable fact.
Many of the things on my list are actually indisputable facts. That they are true doesn't make them any less worthless to hear for the 100th time. This post actually says as much about me as it does about the conference itself. After four or five years of going to the same conference they tend to just run out of content.