This actually sums up my thoughts about exercise science debates. If AGT "doesn't work," then why does it work? There is defintely a point where, if you don't take long enough rests, your performance of subsequent rounds suffers. AGT allows one to get more and more quality reps, which seems to translate to better performance. There are so many training modalities, and many serve specific purposes.
SF is perhaps most "well known" for promoting low reps, AND there's a whole chapter/essay in Beyond Bodybuilding about the advantages of training with high reps. Pavel cites studies showing that those that trained exclusively low-rep had lower vascualrity in their muscles (comparable even to untrained people!) whereas high rep folks had greater vascularity. The section goes on to recommend alternating/cycling through high intensity/low rep phases, moderately high intensity at around 5 rep range, and then low intensity with high reps.
My point is just that there isn't "one best way to train." Just like the caveman argument falls apart when we ask whether cavemen trained to snatch 300lbs or grow huge muscles.
In my searching for AGT-relevant articles for my school project, I have come across studies and researchers trying to prove that lactic acid is GOOD for you..... Like I stated above, I think context and goals are relevent. But at a glance (I didn't have time to read the whole articles...yet) they seemed to be trying to "Debunk" the "lactic acid is bad" train of thought.
As I understand it, AGT allows "normal people" to train pretty effectively without spending nearly as much time training (or recovering from said training) as someone who has devoted their life to getting good at a sport (i.e., professional / olympic / "elite" athletes).
Dr. Kay, whose "job" (i had a look at his LinkedIn page) seems to be "YouTube Provacateur" (i.e., be outrageous, yet believable enough to get eyeballs on my site and get You Tube to send me checks; all while attempting to look like I'm providing a public service by protecting the masses from bad information), implies that SF is "wrong" because heavy glycolytic training is actually more efficient (though "efficiency" is relative; and one has to relate it to the rest of your life.....; it's not just about time spent training; it's also about time spent recovering and not....soldiering, policing, fire protecting, doing your physical job @ the mill, playing with your kids, practicing your martial art; whatever) than either AGT or LISS.
As near as I can tell, elite endurance athletes (and he actually makes the case that the whole notion of BEING an endurance athlete is just....stupid) generally mix glycolytic work with loads of LISS because they have TIME, and, time or no time, elite or not elite, humans can only do SO MUCH glycolytic work without getting sick/injured (and thus going backward). For my part, I attempted to train like this for a few months at the beginning of COVID and found that I was usually "fighting a cold".
SF doesn't, as near as I can tell, contend that elite (particularly endurance) athletes should not do glycolytic training; just that it might not be the ideal/healthiest way for non-elite athletes to train; and that if you ARE going to go down that road, you should have your eyes open and think it through.
He's obviously a smart guy and likely (I'm in no position to judge) didn't say anything that was "wrong", but, as near as I can tell, he cherry-picked and took a lot of the points made in the JRE podcast out of their larger context, and as a "YouTube Provocateur", perhaps willfully.