He's intelligent sure, but we have to remember that it's Pep who encouraged him to play the attacking mid role... Moreover when a player is just 22; is under tremendous pressure to live up to the huge expectations & the hype developed around him, also to be the main man of one of the Europe's biggest clubs; do you really think he could control his temptations to use the easier way possible!?
I mean look at some one like Walcott, his first thought forever had been to try & race past a defender!! I mean
all the time!! People now started saying he doesn't possess the footballing brain
Players gain the maturity through experience, and imo in Messi's case it's been through proper guidance!!