Same with baseball - if you can cover every position defensively but don't stand out at one place, then you're probably going to be a utility guy.
It's pretty hard to doubt the 10,000 touches ruling - it's simple that more and more practice will easily make you a better technical player, it's just to make it to a high level you also have to have the physical elements - strength, build, speed, toughness etc
This is tired typical old english/nz/aussie soccer thinking.
Xavi, iniesta, - are they strong? welterweight physique? fast? built like brick sh1thouse? no, no, no, no, no.
What they do have is great technique and read the game so intelligently and amazing spatial awareness.
I think you underestimate their speed, strength and fitness. Midfield is certainly the place where the physical elements I mentioned matter the least, if you're a target man, central striker or defender, you obviously defenitiely can't just rely on technique alone.
Believe me, I am one of the more-favoured towards technical play. I hate people hoofing it forward, ala Stoke, West Ham etc. I also believe strongly in the 10,000 hours theory of Gladwell. It's just you can't solely preach the technical stuff, because often you can then you end up with a bunch of players who can win tackles, headers, or get past people with speed (and occasionally, can't shoot).