Watching the video again, I think Mark is not suggesting that you necessarily use a poker stiff rod, merely stating the physics of one extreme to the other, he says.... ' No ! You need to apply pressure on the fish to get it in the net ' Which is true ! .... suggesting a softer type rod to achieve that ( I still don't agree with his analogy by the way ).
The 'pressure' needed to bring a fish to the net is ( dependent on the fish being played of course ) a factor that fluctuates through the fight, his analogy of using a ' diamond stiff ' rod and relying on the clutch to give therefore preventing the hook tearing out is true I suppose ! But I think to demonstrate his point you could assume braid was being used so that the only give in this hypothetical analogy is the reels clutch.
I don't think he's suggesting fishing with this kind of set up, but having said that i think there are some who come pretty close, I've read that some anglers telling of their set ups for some rivers, are 3-1/2 lb TC rods, braid, and 8oz leads !!!! That leaves very little give in the set up, and would rely on the clutch or the angler cupping the spool, to absorb the pressure of sudden runs or lunges, and ok fair enough if the angler is skilled enough to do that.
But as Mark acknowledges the prime consideration whatever set up is being used is the fishes lip, being ultimately the weakest point from reel to hook, somewhere in the set up has to be compensation to relieve excessive pressure on the hook hold, or the fish will be lost due to the hook tearing out, the fishes lip will only sustain so much pressure, much of it very sudden, before damage other than the pin prick hole is caused or the hook tears out completely.
My set up is either a 1-3/4 TC or 2lb TC rod, ( same rods alternative tips built by our own Bob Gill ) 12lb Mono size 8 ESP hook ( about the size of the old size 6 ... I wish they wouldn't mess with sizes )
My PB caught last week was no spectacular fight for the majority of it, I was thinking good fish, but nothing really out of the ordinary, until it came to the surface and saw the net, when it made two deep powerful dives into the deep margins, on the mat the hook was buried to the bend, and on removal there was the pin prick hole you would expect, taking my eyes off it for a second or two, I checked again, and it took me a moment to find it again.
Conversely my previous PB fought like a demon, I have never had before or since a Barbel that pulled so hard from start to finish, a similarly small pin prick left by the hook, I wont say I've never had hook pulls, I have but they are very rare, and I put them down to those unfortunate times when the hook grips only a tiny portion of lip flesh, and there is the other factor in the equation, a weak hook hold with a stiff rod, and no give you'll lose the fish on the first decent pull.
So whilst I understand what Mark is saying I just don't agree that a stiff rod, and no give in the set up applies less pressure to the fish, just can't get my head round that one !!