I also suffer from severe asthma and allergies, both of which are, by all accounts, not normal or wanted responses of the immune system, not to mention of the low-end of the horror spectrum when it comes to immune function that is terrifyingly harmful to the host.

It is an exceptionally complex and wonderous thing, but where we diverge is in thinking of it as a "marvel of engineering" or any other prose that implies some sort of guiding hand. It is a far from perfect system, and gets things wrong often enough that we have a global industry creating products to control it.

Heh. It's hard to talk about the way things have been shaped by evolution without implying an actor, because our vocabulary is so very shaped by our subjective experience. I, personally, am reasonably certain that there is no creator in whatever sense. Yet, I'm still awestruck at the ingenuity life on our planet has shown, and the immune system is a never-ending source of wonder to me.

And while it surely isn't perfect, if we were to look at the raw numbers of incidents versus the number of adversary action against your body—that would be pretty darn near perfect.