Yeah I agree. It's a theory, that's all. Perhaps some were double knots and strung without a stringer, and some were different? When I saw the bows and handled a few, there were lots with a second groove on the top nock, and lots without which suggests different methods of stringing.
All I know is that some guys have successfully made and shot bows over 110# using removable horn nocks, Steve Stratton and Dave Pim to name two. Both insanely talented bowyers. There's also (I think) a thread over on PP all about it, but I've not read it in years. I'll see if I can find it, but it might have been on the EWBS forum in which case I can't post it here.