You could debate this forever - does a scholarship given to a kicker provide more, less or equivalent value than a scholarship given to another position?
If that kicker hits a 50-yard FG to win a big game, you could argue that the scholly has provided more value then, say, the scholarship given to the 2nd-string CB or 3rd-team OT. But, at the time that scholarship is given out, the coaches don't know where those players will ultimately wind up on the depth chart. And, if their recruiting pitch is "we want you to be our 3rd-string OT," I don't think they're going to land too many players. Every scholly handed out is given with at least the hope that the player will develop into a starter, or at least a key special-teams contributor.
But, you have to have a kicker. Kickers can win - or lose - games. And if you have to use a scholarship to land a quality kicker, so be it. If the school has any kind of a walk-on program, then you can find a 3rd-string guy or practice squad guy from your walk-on roster, so the scholarship to the kicker should not cause any serious depth problems at another position.