Joseph A. McVeigh
Yes. The Heisman is supposed to go to the "outstanding football player." Such a kicker would score a TON of points, and points win games.
Consider that a 70-yard field goal would be kicked from the team's own 40-yard line (60 yds of field + 10 yds of end zone). On placekicks, the ball is usually placed 7-8 yards behind the line of scrimmage. So a team would have to get only to its own 47-48 yard line to get into field goal range.
Now, watch a college game (it's bowl season, should be easy to find) and check to see how many of a team's posessions stall between its own 47 yard line and the opposition's 28 yard line (from which it's a 45-yard field goal, still good but do-able for many big-time teams' kickers). Multiply by 2 (assumes that a kicker that good will make two-thirds of his long kicks) and that gives you a rough idea of the extra scoring that team gets from having a totally SICK kicker versus just a "good" kicker. Then check that differential against the final score of the game.