Just look at the best players in the game, none of them are elite athletes (I mean, stats wise : leap, explosiveness, speed) because if they were, they wouldn't be that good. Even a breh like Cristiano Ronaldo who is the perfect example of efficiency (speed/power/skills) in the game is ridiculous compared to a breh the likes of Kendell Jones. Not because he can't be more athletic, but because he'd lose (some of) his skills by aiming at a more athletic body. As a matter of fact, look at young Cristiano who wasn't the cyborg he is now, he was frail but far more skilled and unpredictable that what he is right now. He gained some weight, developed his body to be more powerful, more resistant (he was fouled a lot) and more efficient and now he lost some of the magic he had in the late 2000s.
Isn't Ronaldo considered the best all around athlete in soccer, people raving about how high he jumps for headers? Forget Kendell Jones he's actually not that fast or athletic, you're not drawing the proper comparison, look at Derrick Rose (when healthy). He and Ronaldo are the same height 6'1" without shoes, however Rose weighed 15-20lbs more, that sports science shyt revealed Ronaldo's vertical was 31", Rose on the other hand registered a 40" vertical.
Sprint times -
Ronaldo ran 25m in 3.31 secs
Rose ran 23m in 3.03 secs
We have a heavier athlete in Derrick Rose, being far more explosive than Ronaldo, and roughly the same in sprint speed. There are a good deal of US athletes with similar athletic numbers to Derrick Rose, there are a lot of NFL WR/DBs that fall right around 6'0" that are faster/quicker. The point you are missing and the question we're asking is, what if these athletes that can match Ronaldo's great athleticism, had been fed through a world class soccer feeder system instead of basketball/football?
shyt, there was a kid that just went undrafted that is 5'10" 180lbs, he has a 44" vertical and ran 23m in 3.24 seconds, there are LOADS of incredible athletes that just don't make it to the NFL/NBA. Basketball requires skill, you have to be 6'6"+ to get the "He's athletic as hell" pass, there are tons of 6'0" guys with 35"+ verticals that weren't good enough to make it.