I'm sick of this snake-race. Difficulty goes up - difficulty goes down. So what. This is how things go. I could make tons of predictions, every single one would be right someday.
What's more important to me is that the system is kept alive. And this only happens if there are enough private miners. I'm sure the Big Boys know this, and I'm sure they have the possibility to scale down the hash rate as well as they can put it higher.
And if someone tells me "Why don't you buy Bitcoins instead", my response is: I'm not mining only for making some profits, I'm also mining for keeping the system alive. It is - amongst many other things - a political statement, too.
I agree with your view on keeping the system alive. That's the only reason why I started mining is the bitcoin is a great idea.
Too bad hardware and electric costs make it impossible at times to be profitable. As I posted before I gain a little bit of profit due to the fact I buy my electric in bulk so to say I pay it in advance every year and receive a 33% discount from the electric company here in Alaska plus it does cut down on my gas bill so its a win.