there is picking and counterpicking in coh2. Its the same with howitzers... dont cry about howitzer spam if nobody in your team has a doctrine with offmap strikes to destroy them.
If not, well then the person didnt think their loadout through enough or didnt pay attention to the enemy commanders in load screen. And about newer players: Im sure one mortar halftrack doc is part of the free basekit for Wehrmacht
While I agree that countering a doctrine with another doctrine is a decent enough game design, the fact that urban defense is an attempt at cheeseing your opponent out early, but still has the security of lategame with the KV-2 is rather toxic. If firestorm had a lategame callin (and no the hetzer isn't counting) then I'd say it be equally offensive.