I totally agree with your last sentence!
When I said that intelligence is "not simply" another survival mechanism, I wasn't making a statement on its origin (I'm an atheist, I don't believe in ID), but only on how much more powerful intelligence can be, compared to other more basic survival mechanisms.
I don't agree, however, with the more general statement you made, implying that intelligence or behavior don't count as evolution, only biology does. I think evolution has no different rules depending on whether you get your competitive advantage from biology or from intelligence. The only thing that matters is if your genes are passed on, before you get killed.
So, I don't see a divide between the biological and cultural responses, when it comes to evolution. I just see layers upon layers, and evolution working not only on biological levels, but also on individual behavior, and colletive behaviour, to the extent that whole peoples or cultures end up being subject to the same rules of evolution vs. extinction.