Because its not fair to the kids that spend 2 weeks cutting 6 pounds. LOL I love all the guys that are always spouting off " there only kids just let them wrestle" and behind closed doors its all weight lifting and diets. My kids do ok without drinking salt or having apple sauce for every meal. Every kid should get to wrestle even if it means going up because you couldn't make weight (thanks to dad for putting him at such a low weight in the first place). $50 bucks isn't unreasonable at a roller tournament. You're going to spend 500 anyway.
How many kids would cut weight if the choice was actually there choice??? So you shouldn't punish the kids.

PS: If your Doctor tells you that your kid needs to shed some weight you should take HIS advice.