I think he's been asked to take those shots. All premiere PG's in this league have the ability to score. Paul, Deron, Nash, even Kidd to an extent could score at will. I remember earlier in the season and even last season, all Sergio did was pass. It made our offense predictable when he was in because they knew they didn't have to guard him closely. By taking more shots, Sergio keeps opposing defenses honest. Just like LeBron has to chuck up a few threes sometimes. It's not his specialty, but he has to in order to make defenses pay for leaving him open or playing him loosely.