Stagger Lee wrote:
Let's assume that this was a real thing, and there was some kind of massive incentive to accomplish the feat. All of this training wouldn't happen in a bubble. There would be all kinds of economic incentives to help people achieve their goal. Hell, just look at how much cash the diet industry rakes in.
All of the cash floating around would lead to a lot more lab testing and more coaching, which would lead to a lot more trial and error, which would translate into more knowledge about running. The top coaches would attract more people to their methods so injuries would go down and times would improve. Our knowledge of diet and nutrition would improve as well as the PEDs.
People respond to incentives. Even the fast food industry would change to cater to the masses of men trying to break 10:00. Cities would alter sidewalks and trails to make them more conducive to training, and more parks and cross courses would pop into existence. Training grounds would be as numerous as golf courses...you get the point.
Not to mention you would fundamentally alter the mindset of society; it would turn the world into a modern day Sparta. Most people don't like being outliers, so there would be great social pressure to break 10:00. Ostracism and peer pressure are powerful motivators.
So, if there was a perfect world for training and the only limitation was genetics, I would say the number is well over half.
Even if all the above held true, the vast majority would still not sniff 10. The capacity just isn't there. The data is there for cycling. Given very generous assumptions about initial aerobic capacity and VO2, the average person, also with optimal expectations about how much one can improve aerobic performance, can barely reach 65% of the level of a top pro. There is no reason to think it is dramatically different for running.
The only way I could agree with your argument is if you're assuming that in that ultimate hypothetical scenario are coaching will become so vastly improved we will be able to get the average person to improve to a degree that is off the charts by today's standards.