[Lord_Bob]

Caleum fliers are capable of rapidly countering such raids with their flying armies/mages. Stealth nations can "surprise and destroy" such armies. Also, they are capable of equal raids against normal PD with their stealth units, so it balances.

You not "needing" good PD because the enemy does not raid weakly is like saying the enemy didn't press the "I win!" button because there was no "I win!" button. A truism, yes, but not very important. If you have good PD, then stupid weak raids work as a surprise tactic exactly once. Then they stop working. It's not exactly surprising that your opponent doesn't build a strategy around something that doesn't work against you.