Silverback, I am a fan of your logic. I also piss myself at supposed great feats of strength.
There are so many variables in training, yet some want to pin it down to exact science.
To all, good luck with any magical rep formula.
And big Mick, you keep lifting your heavy weights, because that is what you have to do, according to you.
I got up to 172.5kg (touch and go) in bench press, 155kg clean power clean, and I always did mostly moderate weights and higher reps. Perhaps I did not know how to train.
But think about it; Usain bolt was a 200m runner. But, after just a brief period of training for the 100m, boom world records. Logic should tell anyone that there is a transfer from different loads and reps as long as intensity has been stimulated.
Of course, someone can get very strong doing higher reps. Look at Bill Kazmaier. Higher reps, but with intensity.
If a 90kg guy can do 200 strict pushups, not that 2 inch bullshit reps, I will guarantee he will do a good bench (first time).
Herschal Walker is said to have done 170kg first time after a lifetime of just bodyweight exercises (with assistance).
The rep range Strong Enough points to is enough to know that strength can be developed by many types of training over 70% of one's max. I would go as far to say that even 60% is enough to build strength if rests are short enough and intensity remains high. This is my preferred intensity range.
For powerlifters, the need for heavy sets is obvious. In addition to strength, there is considerable skill and feel to lifting such weights, which would indeed be complicated if technique was combined with high reps.
Outside weight lifting and powerlifting, less impediment to a variety of training with a wide range of reps for strength gain.