“Maybe not. But how many fights are you planning on having anyway? There’s time to learn.”
Who plans to have them, other than pro and amateur fighters? Since I enjoy fighting in the ring, I actually do plan to have several, but you cannot predict when you will have a street fight. One of my KF brothers recently got into a fight in a bar. Some guy just from out of nowhere pushed and clocked him. My friend proceeded to take the guy down and subdue him. He didn’t want that fight, it just happened. You can’t train with the mindset of “I have time to learn” You have no way of knowing when you will be attacked.
“Moreover, the effectiveness of the internal arts in many ways comes back to intent (I’m sure the xingyi guys out there would agree). One doesn’t even entertain the notion of being hit - you just want to rip through your attacker like a wild animal.”
That’s a great mindset to be in. The sad reality is that more than likely, you will be hit. you must know how to deal with this.
“The other thing that struck me about your post was that the type of conditioning you’re talking about in taking those “stun” blows is more psychological than pysical, and thus not a matter of hard qigong or weight training”
you are correct. I stated that it was psychological. the head begins to spin and you tend to “forget” your training. The physical aspect had to do with absorbing the blow, not actually coping with it, which I’ll address next. both are necessary.
“I’ve not been hit heavilly in a street fight, but in my training experience I’ve always found it easier to absorb (if not redirect) force by remaining as loose as possible.”
I agree. but if you get hit in the face, you’ve already been hit - you can’t redirect that. I’m not saying tense your muscles when you get hit, I think that’s how you interpreted it. the traps function as shock absorbers, a surge protector of sorts. A developed neck and traps help lessen the shock of a blow to the head. I’ll find some valid medical documents to back that up, but in the meantime, I pulled this off of a shootfighting site:
“Neck muscle strength helps prevent knockouts and cervical injury during chokes or neck crank submissions.”
And I agree, losing a long post sucks!! That’s happened to me several times 
“You ain’t got enough calcium to have a bone to pick wit me,
like a Gracie, I’ll choke a ***** out wit his own gi” - Rass Kass