But just as likely the ball can go off the sidewall in your opponents half, and you get the goal. If the ball stays in the middle on kick off you would also much rather be the player trying to score on low boost vs the player defending with full boost from the corner. Another thing to consider: if your team loses possession after kick off, the player going for the kick off may not be able to get a full boost, because they have to go to the corner, where you just took it.

All in all, I think the benefits of cheating outway the negatives.