Spladle, I figured you would know the context/situation. You raise some very good points, although I don't necessarily agree with everything. The first thing I'll say is that I do agree that we should appreciate the "greats" of wrestling. JB, Snyder, Saitiev, and Sadulaev - all superstars, along with others. But debating the greatest ever is fun, whether it's wrestling or another sport. Certainly no slights are intended.
The circumstances of the Reinoso match are important in my opinion. I actually watched it again last night and I forgot that John was the aggressor throughout (attacks were probably 6-1 in favor of John). You say maybe he would have won if had to or maybe he wouldn't have. But you have to compete with the rules in place at the time, right? My analogy would be (when it was still best of 3 periods in FS) someone winning the 1st period, dropping the 2nd, and then winning the 3rd. No one would remember (or care) about that 2nd period. Both John and Reinoso knew entering the match that Reinoso needed to win big, yet Reinoso took only 1 shot (in SV actually and he didn't score off of it).
I do agree with you, however, that the breakup of the USSR has resulted in much deeper brackets today. Makes things very tough. But on your point about film, was anyone more heavily scouted than John at the time? He competed for years at Worlds, the Olympics, the World Cup, Pan Ams, exhibition matches, etc. The USSR had a ton of film on him, scoured their "Union", and still couldn't find someone to beat him under the bright lights.
And finally...John's 1992 Olympic final...gold #6 at age 26, just a few days shy of his 27th birthday. The GOAT.