I think he's talking about a hypothetical world where one guy only knows sport wrestling and is unaware of the existence of BJJ, and the BJJ guy hasn't done any wrestling as well. BJJ was designed to deal with someone like that. I think unless the wrestler was aware of submissions or had some other background, or had been coached on strategy, the bjj practitioner would eventually catch something. Especially if the physical attributes are equal. People seem to assume that in these situations it's always Royce vs. Severn and there's a 70 pound weight difference.
I agree with everything you said here Rambo but the fly in the ointment as you said is that BJJ players at the very least have a strategy. The art was experimented on for years against your typical wrestler, boxer, judoka etc... So for the sake of argument we are comparing a style that knows and understands the strategy and the "look out fors" and the other style does not.
You cannot compare this in a vacuum, I would say they could and should have the knowledge that is readily available but perhaps they have not cross-trained yet. If that is the case the results would be a mixed bag, strategize to minimize a loss and maximize a win, both grapplers have the ability to do that and it would be a toss up IMO.
We are also talking about a fight, punches, kicks slams all of those things add an element and the wrestler does not always have the advantage, there is nothing saying a bjj guy cant outbox a wrestler at the same time there is no rule that the wrestler has to engage on the ground. Too many variables, as I mentioned this site used to keep stats of "style wins" and wrestling in general did at least as good as BJJ when the stats were kept. There really isnt that much reason to speculate anymore, the numbers dont lie. split pot, 50/50, even steven.
Edit- Well shit here it is!!
STYLE RECORDS RATIO (BEST)
Wrestling/boxing is the #1 style winning 83% of the time 2nd is BJJ/Boxing winning 81% of the time.
Now for "PURE" BJJ and Wrestling it gets flipped but is equally close.
Pure BJJ guys won 63% of the time, pure wrestlers 62% of the time. That is not directly comparing them against each other but I think we can agree that it is almost 50/50 no matter how you look at it.