Because it is fun? It is called asynchronous gameplay and it is actually very popular. It isn't everyone's thing, which is fine. We are trying to support a variety of ways to play the game.
As I've posted a few times, I think the Market will help out people who play the "grindy" way where they just blast through the battles. They can take all those triad coins they earn and spend them on resources.
Forum feedback right now represents less than 5% of the playing population. We've received tons of feedback by other means from people who don't have the same problems with resources you are having. This is largely because they are playing in a different way.
The Market will be the closest thing to this without trivializing the city development part of the game.




