I guess i would look at it the same way i would look at intelligence in the political world...
State secrets are hard to keep. There are actors/[players who are adept at obtaining and/or discerning information. There are those that are less so.
Most of the information is somewhat available, either privately or more publicly.
Most will not oppose the public discussion of "lower level" intel. Higher level intel is more likely to be controversial.
There are those who want to keep information closely guarded, and those who want to open-source information. They usually do not agree
Although the game involves conquest, it also involves exploration, and learning the game itself. Some people prefer conquest, some exploration and building.
If the game was closed ended, then conquest/scoring would be more of a priority. This game is open ended, which does not remove conquest. but tilts the balance somewhat towards exploration and building.
If too many players are eliminated, the game will likely die.
Life is always an entertaining tradeoff