[Micah]

Attacking gets you income but leaves your forces spread out and vulnerable. That's the tradeoff. Taking 90% of someone's lands in a turn means a huge investment of either time/money (sneaking) or gems (teleporting/trapezing) for the attacker, and then the defender has full knowledge of what each of those attack forces consists of and can prepare their counter attack accordingly. If they don't have the gems banked to survive for a few turns without their unforted gem income that's a play choice they decided on. A single SC kill by the defender can be worth a full turn's gem income, and the defender can take their pick of targets.