Hmmm, well first (at least) of one of the three athletes used a little extra to improve their talent. Secondly, a guy like Jonah have made a career out of making hilarious claims about his size (and just about everyhting else - he should really run for president). So I guess even as little as $10k would have guys trying their best to reach 10". And honestly, guys doesn't think of women when they look down at their little friend...
I don't dispute that most athletes use performance enhancing drugs, but the drugs don't make the champion. Regardless of how much PEDs I use, I will never be Simone Biles and the average guy will never be Arnold. I think the same will be true for penises. The average guy will never be 10 inches long, but a guy who is 8 maybe 9 naturally could be.
But here lies the question. Why would he? I for one wouldn't want a 10er over an 8er and I doubt many other women would too. He could go into porn maybe, but who wants to do that really? Most people have dreams and aspirations that not include being a pornstar and while you can monetize most intellectual or athletic skills to some degree, a 10 inch penis neither helps you in your professional life nor in your private life. So most reasonably above average sized guys will not chase that.
What we would need is a person that is reasonably sized and willing to dedicate years of their life to getting 10 inches ... for what exactly? To claim to have the biggest? For 10k on an internet forum? Only very few people are crazy enough to do that and exponentially fewer will be sufficently hung for it.
And if we are speaking about naturally ... I think the talent pool is just too small. As far as I understand this forum predominantely is for english speaking folk, which excludes massive amounts of people that will never ever see or hear about this niche challenge. I am not saying that there will be a guy out there, but comparatively the chances are higher in India, Africa and China than just the US and the EU.
There are tons of pe people here on LPSG and they even have their own forum. I believe the most anyone has legitimately gained in length, after being totally dedicated to doing the pe exercises, etc. is maybe an inch at most. Having the ligament cut doesn't count, but I believe that only gives you about an inch in visible length.
You'd be shocked at what you can do with your ligaments and tendons. People out there are lifting almost half of a metric ton, are able to strech into crazy positions, or perform feats of speed that have never been heard of and you are disputing that you can strech a ligament more than 1 inch?