Quite simply because the other stuff you want to talk about only really applies to your table.
For example, I am currently running a short run dungeon crawl where the party has gone into an ancient vault. The vault is mechanical in nature, with three independent, nested rings. At random intervals, the rings begin spinning, completely rearranging the dungeon layout (I use 5d20 real time minutes to determine when the dungeon spins). The rings are mapped such that they interlock at 45 degree intervals, basically giving me 8 different maps using the same 9 encounters.
Since the spinning is random and very damaging, the party cannot get a complete rest inside the vault and since the entrance is only open to the outside during one of the 8 configurations, they cannot escape the vault either.
Lot's of fun.
But, at this point, what is there to talk about? I think it's a cool dungeon. The players seem pretty groovy with it. Not really sure what else there is to add.
OTOH, I could discuss, since this is a 4e game, how to incorporate a skill challenge into avoiding damage during the spinning process - IOW, a rules discussion and expect to get a fair bit of response. Certainly more than what I'd get just talking about my game. No one really likes gaming stories do they?