Do you doubt the equation which estimates vertical leap or the aquisition of such strength feats for the average person?
While it's true few people have a 40" vertical it's also true the average person neither has the desire to train consistently for a decade and come close to their natural genetic potential in bodybuilding and fewer yet train to meet the requirements of a strong vertical leap.
Furthermore sports are not only about vertical leaps. It is very difficult to reach your maximum power to weight ratio if it isn't the only thing you're training for. For many sports you'll want to be a well rounded athlete. I don't follow NFL. We have AFL and there are also few elite athletes possessing a 40" vertical leap. Thing is these guys have to be strong and have great level of cardiovascular conditioning to get drafted. If they cut the cardio and trained specifically for strength and movement efficiency I have no doubt all of them could achieve a 40" vertical.
I doubt your claims because the real-world evidence is in stark contrast to your claims. Also, regarding training for the NFL combine, many athletes will actually focus on explosiveness, training to maximize their vertical leap, 40-yard dash, broad jump, etc. and also even bench press, depending on what position they play. They also have access to the best of the best professional trainers who teach them the optimal technique for jumping, which I’d wager add a bit to their jumps, and they STILL DON’T hit 40” the majority of the time. Plenty of NFL players squat well over 2x their body weight and don’t touch a 40” vertical, and some people are just amazing jumpers and not great squatters.
Running back Nick Chubb squatted 600lbs at a bodyweight of 230. His vertical was 38.5”. Your equation/calculator gives him an estimated vertical of 43+”. So it’s off by 4+ inches. That’s a very substantial amount when you’re talking 40+”.
Also, when we talk NFL backs, were talking the MOST EXPLOSIVE athletes in the sport, arguably in the country/world. Maybe they can all get to 40”, but even this is highly questionable, but to say that the AVERAGE PERSON, who isn’t a genetically gifted athlete, can get to a 40” vertical is silly.
What’s the record vertical in the NFL? 46”. The highest anyone in the NBA has even claimed or had claimed is 48”, and that’s entirely unsubstantiated. So the difference between literally the most genetically gifted and trained athlete and the average joe who trains their ass off is 6-8”. That’s unlikely, and the numbers don’t support your argument.