Think of it like socialism, why bring in something new and unique if you're just going to dumb it down to basic, ground level because these and these people aren't able to cope with it?
I don't think comparing two different political, economic and philosophical systems is an appropriate analogy to video game balance. Besides nobody (at least, nobody sensible) is arguing for across the board nerfs to WFA & brits, or removal of their interesting mechanics. What we are trying to say is that if there are a few units or features that are overpowered it makes more sense to bring them back to a more reasonable level.
More on topic: I don't think the powercreep has been contained to just WFA. The recent patch contained primarily buffs for Ostheer and Soviets, mostly buffs with some nerfs (net buff overall) to USF, no real change/slight nerf to Brits, and a nerf to OKW.