I'm gonna disagree with you on that.....
The only skill positions that requires a considerable amount of skill and discipline that's comparable to basketball is QB and middle linebacker. The other positions are tough to play mostly because of the competition on a physical level, rather than skill, although skill and experience factors into it a lot. To be able to handle a ball, read defenders, and make jumpshots at a reliable rate takes 5+ years to do consistently for most people, whereas you could probably learn most of the techniques you need to know for your position in 2/3 years.