Ok, I'll bite.
The passage addresses the transmission of information OOC. I think your argument is that we have been debating about the use of OOC information, and therefore these two things are unrelated (if I've got that wrong, please clarify.)
Let's see, why might WotC think tables might want to make a house rule about said transmission? What might players do with that information that would make it worth creating a rule about it?
Could it be that they might...use it?
For example, if my character is in one room and learns something that might be useful to your character, on the other side of the dungeon, and I tell you about it (OOC) across the table, you then have that information.
Now, if it's assumed, or even RAW, that players won't use OOC information, this isn't a problem at all. So why would you bother to need a house rule to decide whether or not that's allowed at your table? You wouldn't.
Obviously the purpose of addressing OOC transmission of information is really about OOC knowledge getting used in the game.
It pains me that we have to argue about this.