My sons all wrestle at the upper end of the weight scale. At that area (IMO) you can see a wider range of body styles. To come come down and find an area that you can be competitive at is IMO not running. At the very begining of the season my son wrestled 14U 165. He has lost 17 pounds this season. The "baby fat" has melted away and he is a very different kid. Were we getting throttled at 165?? YES! Were the kids built very different from us?? YES YES YES!
So did we "run" down?? I guess so. I like to think we made an awesome life change and my son LOVES the sport again.
My other son had a broken foot at the 1st of the season and all year long we have wrestled 10U 120 and we were very competitive. We only weighed 113 (at most) and now we are at 110. We have wrestled BIGGER kids all year long to make us a better/stronger wrestler. So did we "run" down??? I guess so!!!
I think its all in how you look at it.

Weight management is an important part of this sport.
Don't be quick judge people because they drop weight towards the end of the season. Some of it is very natural and some of it is very stratigic.
Either way, it is a part of the sport that will never change.