I believe there is confusion in terms of what to call the most important part of the foot in soccer. Is it called the inside-of-the-foot, instep, or something else? Share your name in a single-question poll.
Using the instep to drive hard shots on goal is great but if they are kicked directly at the goalie, then there is no benefit in the velocity. A better solution is to use the inside-of-the-foot and have players think how they want to score a goal.