Coaches can guide all they want but it takes players to execute.
Begs the next question then, can a player execute if he isn't taught?
I think most players in the NFL are born with natural talent. Coaching might fine tune some of them but IMHO talent is not taught.
You said execute, you didn't say talent.
Haven't met a ball player yet who didn't need to be taught first the basics, and then the nuances at each and every level.
Talent just makes that teaching/learning process easier.