Lucumo: Humans are curious (or at least should be) in general. But despite the base curiosity, I didn't look him up because the OP should provide the information. There are enough threads which aren't worth anything at all and if you spent your time looking up what's missing every single time...it would be a giant waste.
GameRager: 1. Whether a thread is worth anything or not is often subjective(with exceptions like spam, but even then some might get a chuckle from it, I suppose).
2. A few minutes/seconds searching in google is better than wasting too much time sleeping(oversleep), overeating, playing the more time wasting games, etc.
It is, I consider a lot of threads not worth anything because it's not intellectually gratifying. If we had an option to block threads from specific users, I would have used that a long time ago, to keep the thread list more clean.
That depends on what you get from playing games. Relaxation, enjoyment, knowledge, interaction with other players. Those can certainly be worth more than looking something up which may or may not be worth it.