drkodos said:
What good is extra tiles from Cultural expansion if you cannot work them?
1) Freedom of movement - roads on those tiles help you achieve a superiority of mobility against any opponent.
2) Resource exploitation
3) Ability to choose from a wider variety of tiles to work
4) Eliminates need to build obelisk or library early
5) Area denial - if you don't sign rights of passage away, wider borders can cut off enemy routes of expansion, allow you to seal off areas for further expansion where your opponents can't go, without having to settle them immediately yourself
6) Greater freedom in choosing city sites
7) Potential to take workable tiles away from neighboring enemy cities
8) Defense against enemy cultural pressure, and a bonus to applying cultural pressure against them
Cultural border expansion has a great tactical value that should not be underestimated! However, the long term benefits of expansive, because they are long term, are superior, no doubt.